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  1. Lincoln to Washington
  2. In With the Horse Herd
  3. Armillary sphere
  4. Vintage Civil War print of President Abraham Lincoln and his cabinet
  5. Van Gogh from Space - USGS Earth as Art
  6. Be Whoo You Are
  7. How the Titanic Survivors Were Picked Up by the Carpathia
  8. Flatboat, 19th Century
  9. Alice in the Looking Glass House, from 'Through the Looking Glass' by Lewis Carroll
  10. Common Beetles
  11. African Warriors
  12. Wilson Dam, Flood Gates
  13. Vintage Parchment Windmill 1906 Patent Poster
  14. San Francisco Chronicle announcing the end of World War I, 1918
  15. Wheat Mower with Hat, Seen from Behind, by Vincent van Gogh, c. 1870-90
  16. The Summit Of Little Round Top During the Battle Of Gettysburg, 1863
  17. Human anatomy showing deep muscles in the neck and upper back
  18. Normal hip, X-ray
  19. Carl Sagan
  20. Albert Einstein, 1879 - 1955, German Born Theoretical Physicist
  21. Alexander Hamilton, by John Trumbull, 1792
  22. American Frohse Anatomical Wallcharts, Plate II
  23. Unfinished Portrait of Napoleon I formerly attributed to Jacques Louis David 1808
  24. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  25. Scanning electron micrograph of HIV particles infecting a human H9 T cell
  26. Chinese acupuncture model
  27. Jacob's Pharmacy
  28. Digestive system, artwork
  29. The Titanic's propellers in the Thompson Graving Dock of Harland
  30. Highlights from History: Ireland's 'Great Rebellion'
  31. Bolivia, Potosi, Amethyst in a Bolivian museum
  32. Annie Oakley, 1860 - 1926, American Sharpshooter And Exhibition Shooter
  33. Decorative Lintel from the ancient Mayan city of Yaxchilan, Chiapas, Mexico
  34. John Brown on 30 August 1856 intercepting a body of pro-slavery men
  35. Indigo Agate C
  36. Florence Nightingale (1820-1910) illustration from World Noted Women
  37. Hello Calculator
  38. The Lion, Jupiter and the Elephant, illustration from Aesop's Fables
  39. The Fir-Tree and the Bramble, illustration from Aesop's Fables
  40. Portrait Of Rosa Parks, Civil Rights Leader
  41. Poe
  42. Vintage Civil War print of a Union Drummer Boy holding a rifle on battlefield
  43. Superior view of human brain with colored lobes and labels
  44. Cherry Tree - Botanical Illustration
  45. Pi to 2198 decimal place
  46. Stacked Agate I
  47. Surveyors Wanted to Explore Mars and its Moons
  48. Muhammad Ali on the shore of the Congo River, Kinshasa, Zaire