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