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  1. Rice Terraces, Longsheng Ping'an, Guangxi
  2. Prohibition Cartoon, 1920s
  3. Gem Stones III
  4. Columbus, Map, 15th Century
  5. Oregon. Close-up of Graveyard Point Plume Agate stone
  6. Pathways Educational Poster
  7. Kentucky - USGS State Mosaic
  8. Mars
  9. Alexander Mackenzie (1764-1820)
  10. Molecule Milk
  11. James Monroe, by Gilbert Stuart, 1817
  12. Grey School Chalkboard With Many Different Formulas And Signs
  13. Nikola Tesla With An Early Tesla Coil
  14. Grammar Lesson
  15. Human digestive system, with labels
  16. Marley's Ghost. Illustration for the novella A Christmas Carol
  17. Arkansas - USGS State Mosaic
  18. Plan Of the Campaign In New York And New Jersey, 1776
  19. Wheat Mower with Hat, Seen from Behind, by Vincent van Gogh, c. 1870-90
  20. Strength In Numbers
  21. Meadow Saffron - Botanical Illustration
  22. Desk Tools II
  23. George And Martha Washington At Presidential Reception
  24. The Rape of Europa
  25. Sagenite On Mexican Agate
  26. Men in Armour IV
  27. Parana River Delta - USGS Earth as Art
  28. Alice And The Caterpillar
  29. Australia, Northern Territory, Arnhem Land, Mt Borradaile, rock paintings
  30. The Best Teachers
  31. Alice and The Cheshire Cat
  32. Washing Gold, Calaveras, California, 1853
  33. Fagin in the Condemned Cell. Illustration for the novel Oliver Twist
  34. Oregon, Owyhee. Close-up of picture jasper stone
  35. Science classroom
  36. Astronomical Chart I
  37. Utah - USGS State Mosaic
  38. Taking Off..., illustration from 'Wings Across the World', 1978
  39. Mushroom Chart III
  40. Caduceus and graph
  41. Miss Havisham. Illustration for the Charles Dickens novel Great Expectations 1910
  42. History Of Power
  43. The Tea Party II
  44. Women's Rights Parade, 1917
  45. Magic Money
  46. Earth
  47. Portrait of Ulysses S. Grant (1822-85)
  48. George Washington, by Gilbert Stuart, 1821