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  1. Roman Roads
  2. Indigo Agate D
  3. The vertebral column
  4. Bright Periodic Table - White, Classic Text
  5. Normal shoulder, X-ray
  6. Pathways Educational Poster
  7. Dental X-ray
  8. Stamp out Syphilis and Gonorrhea - WPA Poster
  9. Teacher's desk in classroom
  10. RMS Titanic being moved out of drydock, March 6, 1912
  11. Napoleon Bonaparte crossing Alps through Saint Bernard Pass
  12. Wright Flyer sculpture at Wright Brothers National Memorial, North Carolina
  13. Portrait Of Rosa Parks, Civil Rights Leader
  14. General Ulysses S. Grant leading Union troops into battle
  15. Molecule Peppermint
  16. William Edward Burghardt Du Bois, African-American Scholar And Civil Rights Activist
  17. Diphtheria treatment, artwork
  18. Newsboy Ned Parfett announcing the sinking of the 'Titanic' on April 16, 1912
  19. Neptune
  20. Desk Tools IV
  21. Joan of Arc Re-Captures City of Beaugency From the British
  22. A diagram of the Milky Way, depicting its various named parts
  23. Close-Up Of Fortification Laguna Agate
  24. Christmas Jasper
  25. Portrait of Samuel Adams (1722-1803)
  26. Molecule Honey
  27. Sioux Dance, 1890
  28. Christian's Conflict With Apollyon. From The Book The Pilgrim's Progress
  29. Hampton Institute, 1899
  30. Portrait of Patrick Henry (1736-99)
  31. The Hare and the Frogs, La Fontaine's Fables, 1900
  32. Kentucky - USGS State Mosaic
  33. Early Stone Implements
  34. Rib cage and heart, 3D CT scan
  35. The Last of the Spirits. Illustration for the novella A Christmas Carol
  36. Columbus, Map, 15th Century
  37. Vintage Civil War print of President Abraham Lincoln and his cabinet
  38. Conversion
  39. The nerve supply of the trunk
  40. Mexican Revolution (1910-19). Train with wounded revolutionary fighters
  41. James Monroe, by Gilbert Stuart, 1817
  42. Marley's Ghost. Illustration for the novella A Christmas Carol
  43. Arkansas - USGS State Mosaic
  44. Replica Of Eli Whitney's Cotton Gin
  45. Molecule Milk
  46. How Seeds Travel
  47. Plan Of the Campaign In New York And New Jersey, 1776
  48. Australia, Northern Territory, Arnhem Land, Mt Borradaile, rock paintings