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  1. Gem Stones I
  2. Columbus, Map, 15th Century
  3. Prohibition Cartoon, 1920s
  4. Kentucky - USGS State Mosaic
  5. Pathways Educational Poster
  6. Caduceus and graph
  7. Alexander Mackenzie (1764-1820)
  8. Molecule Milk
  9. Mars
  10. Nikola Tesla With An Early Tesla Coil
  11. Grammar Lesson
  12. Grey School Chalkboard With Many Different Formulas And Signs
  13. Rice Terraces, Longsheng Ping'an, Guangxi
  14. Human digestive system, with labels
  15. Arkansas - USGS State Mosaic
  16. Marley's Ghost. Illustration for the novella A Christmas Carol
  17. Plan Of the Campaign In New York And New Jersey, 1776
  18. Oregon. Close-up of Graveyard Point Plume Agate stone
  19. Wheat Mower with Hat, Seen from Behind, by Vincent van Gogh, c. 1870-90
  20. The Summit Of Little Round Top During the Battle Of Gettysburg, 1863
  21. Meadow Saffron - Botanical Illustration
  22. Conceptual image of neuron
  23. Desk Tools II
  24. The Rape of Europa
  25. Men in Armour IV
  26. Parana River Delta - USGS Earth as Art
  27. Alice And The Caterpillar
  28. The Best Teachers
  29. Australia, Northern Territory, Arnhem Land, Mt Borradaile, rock paintings
  30. Alice and The Cheshire Cat
  31. Washing Gold, Calaveras, California, 1853
  32. Science classroom
  33. Oregon, Owyhee. Close-up of picture jasper stone
  34. Fagin in the Condemned Cell. Illustration for the novel Oliver Twist
  35. George And Martha Washington At Presidential Reception
  36. Astronomical Chart I
  37. Sagenite On Mexican Agate
  38. Mushroom Chart III
  39. Utah - USGS State Mosaic
  40. Taking Off..., illustration from 'Wings Across the World', 1978
  41. Sierra de Velasco - USGS Earth as Art
  42. Miss Havisham. Illustration for the Charles Dickens novel Great Expectations 1910
  43. Magic Money
  44. The Tea Party II
  45. Women's Rights Parade, 1917
  46. Portrait of Ulysses S. Grant (1822-85)
  47. History Of Power
  48. George Washington, by Gilbert Stuart, 1821