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  1. Wilson Dam, Flood Gates
  2. Poe
  3. Bees - Vintage Educational Poster
  4. Pastel Periodic Table - Classic Text
  5. Molecule Licorice
  6. Arthritis of the knee, X-ray
  7. William Edward Burghardt Du Bois, African-American Scholar And Civil Rights Activist
  8. Indigo Agate D
  9. Roman Roads
  10. Stamp out Syphilis and Gonorrhea - WPA Poster
  11. Hello Calculator
  12. Normal shoulder, X-ray
  13. Napoleon Bonaparte crossing Alps through Saint Bernard Pass
  14. Wright Flyer sculpture at Wright Brothers National Memorial, North Carolina
  15. Teacher's desk in classroom
  16. Portrait Of Rosa Parks, Civil Rights Leader
  17. Neptune
  18. RMS Titanic being moved out of drydock, March 6, 1912
  19. Diphtheria treatment, artwork
  20. General Ulysses S. Grant leading Union troops into battle
  21. The vertebral column
  22. Newsboy Ned Parfett announcing the sinking of the 'Titanic' on April 16, 1912
  23. Portrait of Samuel Adams (1722-1803)
  24. Hampton Institute, 1899
  25. Desk Tools IV
  26. Close-Up Of Fortification Laguna Agate
  27. Joan of Arc Re-Captures City of Beaugency From the British
  28. A diagram of the Milky Way, depicting its various named parts
  29. Christmas Jasper
  30. The Last of the Spirits. Illustration for the novella A Christmas Carol
  31. Sioux Dance, 1890
  32. The Hare and the Frogs, La Fontaine's Fables, 1900
  33. Early Stone Implements
  34. Rib cage and heart, 3D CT scan
  35. Molecule Honey
  36. Gem Stones III
  37. Vintage Civil War print of President Abraham Lincoln and his cabinet
  38. Conversion
  39. Gem Stones I
  40. James Monroe, by Gilbert Stuart, 1817
  41. Molecule Peppermint
  42. Kentucky - USGS State Mosaic
  43. Pathways Educational Poster
  44. Caduceus and graph
  45. Garden Tulip - Botanical Illustration
  46. Native Americans Bringing Furs To Dutch Traders
  47. Arkansas - USGS State Mosaic
  48. Columbus, Map, 15th Century