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214 results on '"Richard S. Cowan"'

1. Machinery Diagnostics: Fundamentals and Tribosystem Applications

Author

Richard S. Cowan and Ward O. Winer

Subjects
Engineering, business.industry, Nondestructive testing, Condition monitoring, Failure prevention, Structural integrity, Corrosion monitoring, Hydraulic machinery, business, Statistical process control, Asset (computer security), Reliability engineering
Abstract

Machinery Diagnostics deals with the “health” of machines – characterized by “structural integrity” and “functional performance” – and the examination of faults and failures by nondestructive evaluation. The aim of this chapter of the Tribologie-Handbuchis to present the fundamentals of machinery diagnostics and to apply them to tribosystems, which are technical entities containing interacting components in relative motion, subject to friction and wear. The presentation of failure prevention strategies includes root-cause analysis, statistical control, reliability engineering, and asset maintenance. Condition monitoring deals with vibration monitoring, oil monitoring, corrosion monitoring, thermal monitoring, and electrical signature analysis. The application of machinery diagnostics to tribosystems is exemplified with bearings, gears, seals, lubricants and hydraulic systems.

Published
2015
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2. High velocity wear: Experiments and modeling

Author

Matthew J. Siopis and Richard S. Cowan

Subjects
White light interferometry, business.product_category, Materials science, media_common.quotation_subject, High velocity, Metallurgy, chemistry.chemical_element, Inertia, Wedge (mechanical device), chemistry, Aluminium, Slider, Georgia tech, Composite material, business, Material properties, media_common
Abstract

Mechanical wear at high sliding speeds is an important consideration in designing more efficient and effective electromagnetic launcher components. Understanding the influence of sliding velocity, contact pressure, and material properties on wear rates is important in developing predictive models for design. A novel inertia loaded wedge experiment is employed at Georgia Tech to study wear at sliding speeds and contact pressures in excess of 1,000 m/s and 100 MPa for a 6061-T6 aluminum slider on a C110-H2 copper guider. Test results showed a transition from mild to severe wear took place at approximately 30.5 cm or 1,000 m/s, which corresponds to a mechanical heating rate of 100 × 109 N/m·s. Aluminum deposition on the guiders was quantified using a white light interferometer and plotted as a function of position and velocity. A normalized wear rate model in the severe wear region was developed.

Published
2014
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3. Memories of the New York Botanical Garden, 1948–1957

Author

Richard S. Cowan

Subjects
Plant ecology, Geography, Agroforestry, Systematic Botany, Environmental ethics, Botanical garden, Plant Science, Ecology, Evolution, Behavior and Systematics
Abstract

Memories of systematic botany at The New York Botanical Garden from 1948 to 1957 are given.

Published
1996
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7. Thermomechanical wear modelling

Author

Richard S. Cowan and Ward O. Winer

Subjects
Materials science, Mechanical Engineering, Metallurgy, Surfaces and Interfaces, Surfaces, Coatings and Films, Stress field, Contact mechanics, Mechanics of Materials, visual_art, Fracture (geology), visual_art.visual_art_medium, Ceramic, Composite material, human activities
Abstract

It is assumed that the contact between bodies in sliding motion produces a stress field and frictional heat source that may induce severe wear from material yielding or fracture. For this situation, a thermomechanical wear model is used to develop a wear transition equation for identifying the dominant factors that will reduce or control such wear, by employing thermoelasticity analyses and contact mechanics. This equation is used to construct wear maps for ease of analysis. Studies are used to substantiate the thermomechanical wear model with experimental results that emphasise the transition from mild to severe wear for dry and lubricated metallic and ceramic sliding contacts under load.

Published
1994
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8. Prediction of Failure Transitions in Sliding Contacts by a Thermomechanical Wear Model

Author

Richard S. Cowan, Ward O. Winer, and Jinseung Yang

Subjects
Contact mechanics, Materials science, Calculated data, Mechanics of Materials, Mechanical Engineering, Forensic engineering, Surfaces and Interfaces, Composite material, Intensity (heat transfer), Surfaces, Coatings and Films
Abstract

A wear equation in general form is offered by which the transition between mild wear and severe wear is identified. This wear criteria equation is governed by three nondimensional parameters: Fo, CT, and Gt, which are measures of time, material property dependence on temperature, and thermal stress intensity, respectively. From this equation, wear maps are constructed. Along with results from Hertzian contact theory, the wear criteria equation and wear map can be used for design guidance. As an example, AISI 52100 steel is examined by comparing calculated data, based on a thermomechanical wear model, with experimental results of sliding contacts. The critical temperatures at which thermomechanical wear can occur are also calculated.

Published
1993
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9. Surface engineering: An enigma of choices

Author

Ward O. Winer and Richard S. Cowan

Subjects
Surface (mathematics), Acoustics and Ultrasonics, Computer science, Nanotechnology, Overlay, engineering.material, Surface engineering, Condensed Matter Physics, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Coating, engineering, Deposition (phase transition), Surface modification, Development (differential geometry), Biochemical engineering, ComputingMethodologies_COMPUTERGRAPHICS
Abstract

In order to generate the optimum surface, without negatively influencing the desired properties of the subsurface material, a myriad of surface selection techniques are available to choose from. This paper provides an overview of these methods, by broadly classifying the surface and overlay coating treatments currently used, according to the fabrication styles of atomic deposition, bulk deposition and direct surface modification. Insight into the research, development and utilization of these concepts, so as to address the needs of surface engineers today and in the future, is offered.

Published
1992
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10. Tribology research at Georgia Tech

Author

Ward O. Winer, Richard F. Salant, Richard S. Cowan, Scott Bair, Jeffrey L. Streator, and Itzhak Green

Subjects
Engineering, Mechanics of Materials, business.industry, Mechanical Engineering, Georgia tech, Mechanical engineering, Surfaces and Interfaces, Tribology, business, Manufacturing engineering, Surfaces, Coatings and Films
Published
1992
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11. Finite Element Analysis of Contact and Structural Phenomena of a Lab-Scale Electromagnetic Accelerator

Author

Bummo Chung, Richard S. Cowan, and Itzhak Green

Subjects
Engineering, business.industry, Modal analysis, Lab scale, Structural engineering, Finite element method, law.invention, law, Normal mode, von Mises yield criterion, business, Contact area, Contact pressure, Armature (electrical engineering)
Abstract

This work presents a finite element analysis (FEA) of the initial armature-to-rail contact of a lab-scale electromagnetic accelerator (12.5 mm rail height) and a modal analysis of the armature. Structural results of the von Mises stress, the contact pressure, and the contact area are presented with the vibrational characteristics (frequencies and mode shapes) of the un-stressed and the pre-stressed armature.

Published
2007
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12. AUSA workshop executive summary

Author

Richard S. Cowan, S. L. Rohde, and William K. Grant

Subjects
Materials science, Executive summary, Materials Chemistry, Surfaces and Interfaces, General Chemistry, Condensed Matter Physics, Surfaces, Coatings and Films, Management
Published
1996
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13. Condition Monitoring Tools for Tribologists

Author

Richard S. Cowan and Ward O. Winer

Subjects
Mechanical system, Acoustic emission, Computer science, Ultrasonic testing, Condition monitoring, Wear particle, Automotive engineering
Abstract

This paper addresses technologies for minimizing the impact and occurrence of critical failures in mechanical systems. Attention is focused on tools of use to a tribologist in detecting and identifying incipient material failures, predicting the occurrence of such failures, and monitoring the condition of a triboelement in real-time.

Published
2001
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15. Application of the Thermomechanical Wear Transition Model to Layered Media

Author

Richard S. Cowan and Ward O. Winer

Subjects
Stress field, chemistry.chemical_compound, Materials science, Calculated data, chemistry, Thermal, Substrate (electronics), Composite material, Layer thickness, Titanium nitride, Isothermal process, Surface film
Abstract

Sliding surfaces in contact produce a stress field and frictional heat source which may induce severe wear from material yielding. The initiation of such thermomechanical wear will be influenced by a surface film, possessing different thermal and mechanical properties than those of the substrate. Conditions for layered systems that can be treated as monolithic, and therefore amenable to the application of the current thermomechanical wear transition model, are discussed considering thermal and isothermal effects. A range of layer thickness and material combinations are presented, such that when coupled with the conditions of operation can be used for design guidance. As an example, steel coated with titanium nitride is examined by comparing calculated data, based on the thermomechanical wear model, with experimental results.

Published
1993
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16. Jubelina riparia

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1518267%5DMICH-V-1518267, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1518267/MICH-V-1518267/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1954

17. Pterandra arborea

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1516170%5DMICH-V-1516170, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1516170/MICH-V-1516170/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1954

18. Rinorea amapensis

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1122206%5DMICH-V-1122206, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1122206/MICH-V-1122206/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1954

19. Acmanthera cowanii

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1102000%5DMICH-V-1102000, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1102000/MICH-V-1102000/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1954

20. Actinostachys pennula

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Pteridophytes, http://name.umdl.umich.edu/IC-HERB00IC-X-1581592%5DMICH-V-1581592, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1581592/MICH-V-1581592/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1955

21. Telmatoblechnum serrulatum

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Pteridophytes, http://name.umdl.umich.edu/IC-HERB00IC-X-1612950%5DMICH-V-1612950, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1612950/MICH-V-1612950/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1954

22. Stigmaphyllon sinuatum

Author

Richard S. Cowan and B. Maguire, Richard S. Cowan and B. Maguire, Richard S. Cowan and B. Maguire, and Richard S. Cowan and B. Maguire

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1526346%5DMICH-V-1526346, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1526346/MICH-V-1526346/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1954

23. Stigmaphyllon convolvulifolium

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1524920%5DMICH-V-1524920, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1524920/MICH-V-1524920/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1954

24. Byrsonima christianeae

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1548616%5DMICH-V-1548616, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1548616/MICH-V-1548616/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1954

25. Tetrapterys nitida

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1545194%5DMICH-V-1545194, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1545194/MICH-V-1545194/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1954

26. Trichomanes pinnatum

Author

Basset Maguire, Richard S. Cowan & Job C. Lindeman, Basset Maguire, Richard S. Cowan & Job C. Lindeman, Basset Maguire, Richard S. Cowan & Job C. Lindeman, and Basset Maguire, Richard S. Cowan & Job C. Lindeman

Abstract

Pteridophytes, http://name.umdl.umich.edu/IC-HERB00IC-X-1572003%5DMICH-V-1572003, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1572003/MICH-V-1572003/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1955

27. Marattia douglasii

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Pteridophytes, http://name.umdl.umich.edu/IC-HERB00IC-X-1003928%5DMICH-V-1003928A, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1003928/MICH-V-1003928A/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1947

28. Dictyota guineensis

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-634188%5DMICH-A-634188, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/634188/MICH-A-634188/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

29. Dictyota mertensii

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-634418%5DMICH-A-634418, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/634418/MICH-A-634418/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

30. Dictyota ciliolata

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-633740%5DMICH-A-633740, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/633740/MICH-A-633740/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

31. Dictyopteris delicatula

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-632791%5DMICH-A-632791, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/632791/MICH-A-632791/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

32. Dictyopteris justii

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-633039%5DMICH-A-633039, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/633039/MICH-A-633039/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

33. Turbinaria tricostata

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-630348%5DMICH-A-630348, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/630348/MICH-A-630348/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

34. Chnoospora minima

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-631318%5DMICH-A-631318, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/631318/MICH-A-631318/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

35. Sargassum natans

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-629278%5DMICH-A-629278, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/629278/MICH-A-629278/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

36. Sargassum hystrix

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-629118%5DMICH-A-629118, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/629118/MICH-A-629118/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

37. Laurencia intricata

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-622075%5DMICH-A-622075, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/622075/MICH-A-622075/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

38. Laurencia obtusa

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-622012%5DMICH-A-622012, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/622012/MICH-A-622012/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

39. Waldoia antillana

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-1306816%5DMICH-A-1306816, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1306816/MICH-A-1306816/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

40. Sarcodiotheca dichotoma

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-1306698%5DMICH-A-1306698, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1306698/MICH-A-1306698/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

41. Meristotheca tobagensis

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-1306561%5DMICH-A-1306561, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1306561/MICH-A-1306561/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

42. Udotea flabellum

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-732709%5DMICH-A-732709, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/732709/MICH-A-732709/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

43. Penicillus dumetosus

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-730944%5DMICH-A-730944, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/730944/MICH-A-730944/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

44. Penicillus capitatus

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-730800%5DMICH-A-730800, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/730800/MICH-A-730800/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

45. Halimeda opuntia f. cordata

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-729373%5DMICH-A-729373, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/729373/MICH-A-729373/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

46. Halimeda opuntia

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-729250%5DMICH-A-729250, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/729250/MICH-A-729250/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

47. Halimeda discoidea

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-728581%5DMICH-A-728581, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/728581/MICH-A-728581/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

48. Halimeda incrassata

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-728748%5DMICH-A-728748, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/728748/MICH-A-728748/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

49. Codium intertextum

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-726549%5DMICH-A-726549, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/726549/MICH-A-726549/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

50. Cladophora vagabunda

Author

Richard S. Cowan, Richard S. Cowan, Richard S. Cowan, and Richard S. Cowan

Abstract

Algae, http://name.umdl.umich.edu/IC-HERB00IC-X-725343%5DMICH-A-725343, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/725343/MICH-A-725343/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1959

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