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  1. Wilson Dam, Flood Gates
  2. Poe
  3. Bees - Vintage Educational Poster
  4. Pastel Periodic Table - Classic Text
  5. Arthritis of the knee, X-ray
  6. William Edward Burghardt Du Bois, African-American Scholar And Civil Rights Activist
  7. Indigo Agate D
  8. Roman Roads
  9. Stamp out Syphilis and Gonorrhea - WPA Poster
  10. Molecule Licorice
  11. Hello Calculator
  12. Napoleon Bonaparte crossing Alps through Saint Bernard Pass
  13. Wright Flyer sculpture at Wright Brothers National Memorial, North Carolina
  14. Normal shoulder, X-ray
  15. Teacher's desk in classroom
  16. Portrait Of Rosa Parks, Civil Rights Leader
  17. RMS Titanic being moved out of drydock, March 6, 1912
  18. Neptune
  19. General Ulysses S. Grant leading Union troops into battle
  20. Newsboy Ned Parfett announcing the sinking of the 'Titanic' on April 16, 1912
  21. The vertebral column
  22. Diphtheria treatment, artwork
  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. The Last of the Spirits. Illustration for the novella A Christmas Carol
  30. Christmas Jasper
  31. Sioux Dance, 1890
  32. Paisley Agate
  33. Molecule Honey
  34. The Hare and the Frogs, La Fontaine's Fables, 1900
  35. Early Stone Implements
  36. Rib cage and heart, 3D CT scan
  37. Blues Guitarist And Singer Rosetta Tharpe Playing Steel Guitar
  38. Vintage Civil War print of President Abraham Lincoln and his cabinet
  39. Gem Stones III
  40. Conversion
  41. Gem Stones I
  42. Molecule Peppermint
  43. James Monroe, by Gilbert Stuart, 1817
  44. Kentucky - USGS State Mosaic
  45. Pathways Educational Poster
  46. Garden Tulip - Botanical Illustration
  47. Caduceus and graph
  48. Arkansas - USGS State Mosaic