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2. Dry Dyes
3. From Wet Plate to Motion Pictures
4. The Invention and Development of Photography
5. How the Government Tests Paper
6. From Easel to Cover
7. Inventions New and Interesting
8. How Waste Paper is Treated to Make New Paper
9. MATHEMATICAL GAMES
10. THE AMATEUR SCIENTIST
11. Ink-Jet Printing
12. Extra! Extra!
13. LETTERS
14. TYPESETTING
15. PINOCYTOSIS
16. SCIENCE AND THE CITIZEN
17. Radio Facsimile
18. Creative Enlargement
19. PRESERVING NEWSPAPER FILES
20. Super-Sight With Phototubes
21. Moisture Meters Move Up
22. Camera Engraving
23. CAMERA ANGLES ROUND TABLE
24. CAMERA ANGLES
25. WHAT'S NEW In Photographic Equipment
26. CAMERA ANGLES
27. CHARLES SEDGWICK MINOT
28. ADVANTAGES OF PAPER NEGATIVES
29. EXPORTS TO PORTO RICO
30. Calculating Horse Powers of Engines
31. The Wheels of all Vehicles, Dynamical Levers
32. Does Resistance Increase as the Square or Cube of the Velocity?
33. Copying Copperplate Engravings on Stone
34. Contents of Cylinder in Gallons
35. Do We Measure Horse-power Correctly?
36. Kerosene Lamps---A Good Suggestion
37. APPLICATIONS FOR THE EXTENSION OF PATENTS
38. Answers to Correspondents
39. REPRODUCTION OF WORKING DRAWINGS
40. THE THREE-TOOTHED LAMPREY
41. The Government Work for Good Roads
42. MUTUALLY PROFITABLE
43. DEVELOPMENT OF COLOR-PHOTOGRAPHY
44. THE AMERICAN TROTTER ABROAD
45. CONGRESS AND THE PNEUMATIC DISPATCH SYSTEM IN THIS CITY
46. PRELIMINARY HEARING OF THE PRESIDENT'S CANAL COMMISSION
47. THE BURRY PAGE-PRINTING TELEGRAPH
48. PHOTOGRAPHY IN THE PAST YEAR
49. RULES FOR FIRING CANNON
50. THE MANUFACTURE OF "GREENBACKS."
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