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  1. Row of pencils on table
  2. Vintage Parchment Otoscope Patent Print
  3. Human Skeleton: Lateral view in Crouching Posture
  4. Circulatory system and brain, artwork
  5. Science classroom
  6. Alfred (849-899) disguised as a minstrel in the camp of King Guthrum
  7. Close Ups Of Fortification On Crazy Lace Agate
  8. Classical Montage
  9. Mission Santa Ynez or Ines, Solvang, California
  10. Circulatory system and brain, artwork
  11. The cervical vertebrae
  12. The Dream
  13. Desert Patterns - USGS Earth as Art
  14. Canada, Quebec. Honey Economusee. Beehive
  15. Pipes at Nesjavellir Geothermal Power Plant, Iceland
  16. To Polish The Sun
  17. Nebraska - USGS State Mosaic
  18. Cross section biomedical illustrationBiomedical illustration of dental filling
  19. Portrait of Henry Knox (1759-1806)
  20. Practical Mechanics, September 1956
  21. Long Island Railroad Communication Lines
  22. Bright Periodic Table - Black, Classic Text
  23. Male skeleton, computer artwork.
  24. Practical Wireless, May 1957
  25. License Plate Periodic Table
  26. Bright Periodic Table - Navy, Classic Text
  27. Work the Night Shift on Martian Moon Phobos
  28. Globe And Books
  29. Cingulate gyrus in the brain, artwork
  30. Roof of the World - USGS Earth as Art
  31. Washington - USGS State Mosaic
  32. Portrait of Anton Chekhov (1860-1904) 1902
  33. Martin Luther King, Jr. (1929-1968)
  34. Bomjamin II
  35. The Tocsin Of Liberty Rung By The State House Bell, Philadelphia On July 4th 1776
  36. The human body with superimposed colored plates by Julien Bougle
  37. Generator and Fan Belt in a Car Engine
  38. Coahuila, Mexico - USGS Earth as Art
  39. Deforestation
  40. Illustration of strip of land known as the 'fertile crescent'
  41. California - USGS State Mosaic
  42. Outback Abstract
  43. Thel's Motto, plate 2 from The Book of Thel, 1789
  44. Hampton Institute, 1899
  45. Teacher Truths VII-Rewarding
  46. Conceptual image of platelet, red blood cell and white blood cell
  47. Relief depiction of Ramses II, Temple of Luxor, Egypt
  48. Harriet Tubman, 1911