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  1. Washington's Entry Into New York On The Evacuation Of The City By The British In 1783
  2. Camera man Don Clark and Director James Tinling film a scene for 'Change of Heart'
  3. Vintage presidential election poster
  4. Taking Off..., illustration from 'Wings Across the World', 1978
  5. Former Beatle George Harrison (left) and Indian musician Ravi Shankar
  6. Ferry boat altered to gunboat during the American Civil War
  7. Donati's Comet of 1858, artwork
  8. Diphtheria treatment, artwork
  9. Fortifications in front of Atlanta, Georgia, during the American Civil War
  10. View Of Danzig, Poland From River, 1939
  11. The Inauguration Of First President Of The United States In 1789, New York
  12. Soldiers at camp during the American Civil War
  13. Barack Obama (1961- )
  14. House Chambers In The U. S. Capitol
  15. Instruments for removing bladder stones
  16. Cold War medical training, 1958
  17. Barack Obama (1961- )
  18. Knocking-off time at the Harland
  19. General Philip Kearny's fatal charge at the Battle of Chantilly
  20. Fun Facts about the U.S. Presidents
  21. Aden From The Air
  22. Chamber Cranes In Pedro Miguel Locks
  23. Niels Bohr, James Franck, Albert Einstein, and Isidor Rabi
  24. 19th Century internal combustion engine
  25. Neptune fountain at Navona square, Rome
  26. Elijah Muhammad (1897-1975)
  27. Camel riders at Giza Pyramids, Giza, Cairo, Egypt, Africa
  28. Japanese Samurai Blade
  29. Plans For The Maryland State House
  30. German WWII ramjet bomber blueprint
  31. Early American steam locomotive
  32. A Prehistoric Mammoth Hunt
  33. World Trade Center Ground Zero site under reconstruction Sept 8, 2011
  34. The Krak des Chevaliers, Crusader castle, Syria, Middle East
  35. Newgrange, County Meath, Leinster, Republic of Ireland, Europe
  36. Woman standing at long row of bobbins, at a textile factory, Millville, NJ, 1936
  37. Silversmith at work, c.1914
  38. Edison talking into his phonograph
  39. Department Of Justice Building In Washington D. C
  40. Pascal's calculator, 17th Century artwork
  41. Check Up
  42. Lovecraft
  43. Ensisheim meteor fall, 1492
  44. Eiffel Tower During Construction
  45. Painting of a wallaby at the Aboriginal rock art site at Ubirr Rock, Australia
  46. The Earth's seasons
  47. War-dance of Bantu tribesmen
  48. Mae Jemison (1956- )