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  1. Alcatraz Island and the San Francisco Bay and skyline of San Francisco, California, USA
  2. Protozoa, historical artwork
  3. American history painting of President William Henry Harrison
  4. Madonna of the Prairie
  5. General Philip Kearny's fatal charge at the Battle of Chantilly
  6. Ortelius's map of Austria, 1570
  7. Chief Joseph Brant
  8. Library Of Congress Reading Room
  9. On his rocker, instead of off, is Groucho Marx posing as Whistler's Mother
  10. Obama And Mandela, 2011
  11. Paul Charles Morphy (1837-84) engraved by D.J. Pound from a photograph
  12. Zora Hurston Beating The Hountar (Mama Drum), 1937
  13. Civil War Poster Seeking Vermont 9Th Infantry Recruits
  14. Sailors on deck of USS Mendota gun boat during American Civil War
  15. Thomas Edison, US inventor
  16. Total solar eclipse, 1878
  17. Study for 'Light Battery at Gettysburg'
  18. You Can Help, American Red Cross, 1918
  19. Moon Walk
  20. Moses and the Burning Bush
  21. The Army that Fought at Sea
  22. Graham Hill, waves as his car streaks toward the finish line to win the Indianapolis 500
  23. Maat, goddess of wisdom, justice and truth, Egypt, Luxor Temple
  24. Discovery Hind Leg Of The Dinosaur Diplodocus, By Henry Fairfield Osborn In 1898
  25. Robert Emmet McGrath, as character Bob Johnson, on Sesame Street, 1970
  26. Knocking-off time at the Harland
  27. The History of Our Wonderful World: The Vikings
  28. First Atom Bomb Test Site
  29. German WWII ramjet bomber blueprint
  30. James Baldwin (1924-1987
  31. Taverns And Wagons In Western American Town
  32. Sunwatch Indian
  33. Relief depicting a pharaoh making an offering, Temple of Luxor, Egypt
  34. Laocoon group, Vatican Museums
  35. President John F. Kennedy visits with reporters
  36. Vintage World War II artwork of President Franklin Delano Roosevelt
  37. View Of Danzig, Poland From River, 1939
  38. Camel riders at Giza Pyramids, Giza, Cairo, Egypt, Africa
  39. View of Tangier from the Seashore, 1856-8
  40. The Wonderful Story of Britain: The Boston Tea-Party
  41. Roy Campanella, catcher for the Brooklyn Dodgers, holding six bats, June 4, 1953
  42. Napoleonic Wars, Portrait of Haiti's leader, Toussaint L'ouverture, By Louis Bombled
  43. First Letter Carried By Pony Express
  44. President John F. Kennedy signing the Equal Pay Act
  45. Beatus of Girona. 976. Sheet 6, depiction of Saint John the Evangelist
  46. Distillation, 16th century woodcut
  47. Indian Motor Cycle Ambulance
  48. World War II War Bonds poster, 1943