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2. ENZYMOLOGY, CLINICAL CHEMISTRY, AND THE DEVELOPMENT OF FAST ANALYZERS11Portions of this paper were presented in Munich, Germany, April 25, 1972, by Norman G. Anderson for the prize lecture in acceptance of the Presis Biochemische Analytik. This prize was awarded for the development of the GeMSAEC Fast Analyzer. The prize lecture was published in Z. Anal. Chem. 261, 257 (1972), and we wish to thank Springer-Verlag for allowing us to reproduce portions of that paper.

3. ON THE UNDERINVOICING OF IMPORTS**This paper was written during my assignment as an Organization for Economic Development and Co-operation (OECD) Consultant in Turkey during April–July 1964. Its originality consists neither in discovering that underinvoicing of imports can occur nor in finding out that c.i.f. import statistics can be less than the corresponding f.o.b. export statistics, a fact well known to statisticians of international trade. It consists in (i) inferring the former from the latter; (ii) linking it to the phenomenon of tariffs and import control; and (iii) using the exercise to make informed inferences about the areas into which ‘black’ exchange is leaking and hence to assess better the ‘losses’ imposed by such a leakage. In my statistical work on the Turkish trade data, I have profited greatly from conversation with R. Gross, who had already noticed discrepancies between Turkish c.i.f. and partner-countries' f.o.b. values for a single year. My thanks are also due to Professors Bent Hansen and Besim Ustunel for useful discussions in the preparation of this paper.

4. Potentials for Immunologic Intervention in Cancer**This paper supported in part by grants from the American Cancer Society (a Frances K. Braden Memorial Grant for Cancer Research, ACS-ET-6B), the Florida Division of the American Cancer Society (F-7-OUF), an American Cancer Society Institutional Grant (IN-62-G), the National Institute of Child Health and Human Development (HD-00384), the National Institute of General Medical Sciences (GM-01996), and a training grant in cellular immunobiology from the National Institute of Allergy and Infectious Diseases (AI-00401).This paper represents an amplification of remarks made introducing a session of the Fifth Annual Brook Lodge Conference, April 26–28, 1971.

5. Some Physical Properties of Monolayers and Their Relation to Evaporation Retardation**Editor's note : This manuscript was submitted on January 15, 1960 for publication in the Journal of Colloid Science. Its publication has been delayed in order to include it in the present volume.††Author's note: The papers of V. K. La Mer and M. L. Robbins [J. Phys. Chem. 62, 1291 (1958)] and particularly M. L. Robbins and V. K. La Mer [J. Colloid. Sci. 15, 123 (1960)], and of V. K. La Mer and G. T. Barnes [Proc. Natl. Acad. Sci. U.S. 45, 1274 (1959)], have appeared in the interval which has elapsed. Some of their results have bearing on the problems treated in this paper.

8. Preface to Chapter VI* *The editors have selected for inclusion in this chapter representative papers offered during sessions of the AIAA Communications Satellite Systems Conference that dealt with non-technological aspects of communication satellite systems. In preparing these papers, the authors have considered “sociology” as the study of the history, development, organization, and problems of men in social groups, with particular attention to desires to establish national, regional, and international communication satellite systems.

9. Some Contextual Determinants of Stimulus Potency11The author of this paper wishes to thank Laura Rosenthal and Danielle spiegler for their dedicated editorial assistance and constructive suggestions in the preparation of this report. Dr. Donald M. Baer's suggestions helped to improve an early version of this paper. The opinions expressed herein are those of the author and do not necessarily represent the positions of the National Institute of Mental Health.

12. A Theory of Vocational Choice**The author wishes to acknowledge the constructive and critial reviews of this paper by Donald L. Thistlethwaite, C. H. Patterson, Junlius Seeman and John W. Gustad. This paper was supported in part by research grants from the National Science Foundation and the old Dominion Foundation.(Reprinted from Journal of Counseling Psychology, vol. 6, No. 1 (1959), pp. 35–43, by permission of publisher and author.)

13. A PRODUCTION SYSTEM FOR COUNTING, SUBITIZING AND ADDING11This paper presents a detailed description of production systems; there are several background papers that are required to fully understand the methodology and the particular substantive problems to which it is applied. For the general theoretical orientation, see Newell and Simon (1972); for the details of production systems and the rules of a production system interpreter, see Newell (1972). For the problems of cognitive development involving quantitative comparison, see Klahr and Wallace (1972); for quantitative processes data and theory, see Klahr (1972), and Klahr and Wallace (1973).

19. One-Parameter Families of Vector Fields on Two-Manifolds: Another Nondensity Theorem††AMS (MOS) 1970 SUBJECT CLASSIFICATION: 58F10.‡‡Research supported by National Science Foundation (GP-7952X2) at the Institute for Advanced Study, Princeton, New Jersey.§§Conversations with Jorge Sotomayor, Jurgen Moser, and Clark Robinson were very helpful in the preparation of this paper. In particular, Sotomayor pointed out several errors in an earlier version of the paper. Moser patiently explained the theorem of Arnold-Moser to the author, and Robinson showed the author the final argument, which proves the nondensity theorem for s < ∞.

25. A Critical Discussion on the Planning Considerations of Electric Propulsion for Space Missions Presented at the AIAA Third Biennial Aerospace Power Systems Conference, Philadelphia, Pa., September 1-4, 1964 (not preprinted). This paper was prepared upon the strong recommendation of the AIAA Technical Committee for Electric Propulsion, whose support has made it possible for presentation. I also wish to thank E. Stuhlinger, W. E. Moeckel, T. N. Edelbaum, R. S. H. Toms, T. F. Widmer, and Mrs. E. W. Speiser for their cooperation and timely comments in the preparation of this discussion. This paper presents the results of one phase of research carried out at the Jet Propulsion Laboratory, California Institute of Technology, under Contract No. NAS 7-100, sponsored by the National Aeronautics and Space Administration.

27. Constraints on the Operant Conditioning of Drinking11The preparation of this paper and research described in it were supported by Research Grant No. 258 from the Ontario Mental Health Foundation and by Research Grant No. APA-0042 from the National Research Council of Canada to A. H. Black. We would like to thank E. M. Striker and H. M. Jenkins for their ideas on some of the issues discussed in this paper.