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