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  1. World War II poster showing the silhouette of a soldier with his finger to his lips
  2. Knocking-off time at the Harland
  3. George Washington Carver
  4. General Philip Kearny's fatal charge at the Battle of Chantilly
  5. Water mill and pump, 18th century
  6. Fun Facts about the U.S. Presidents
  7. American Red Cross Serves Humanity Join!
  8. Aden From The Air
  9. Dennis Banks
  10. Chamber Cranes In Pedro Miguel Locks
  11. George Washington Carver (c1864-1943)
  12. Facade Of The Los Angeles Stock Exchange
  13. Marco Polo
  14. Plans For The Maryland State House
  15. French Writer Albert Camus (1913-1960) At Home June 13, 1947
  16. Niels Bohr, James Franck, Albert Einstein, and Isidor Rabi
  17. Harold Lloyd
  18. 19th Century internal combustion engine
  19. Covered wagon at Scotts Bluff National Monument, Nebraska
  20. Neptune fountain at Navona square, Rome
  21. Elijah Muhammad (1897-1975)
  22. LiquidLibrary
  23. Madame C.J. Walker (1867-1919)
  24. Queen Mary of England by Antonio Moro
  25. Victorian or Edwardian Beach Scene
  26. World War I poster of a Navy patrol boat in the sea and a plane shining a spotlight
  27. Charles Haddon Spurgeon (1834-92) engraved by D.J. Pound from a photograph
  28. Japanese Samurai Blade
  29. Camel riders at Giza Pyramids, Giza, Cairo, Egypt, Africa
  30. German WWII ramjet bomber blueprint
  31. Table from Becher's 'Opuscula chymica'
  32. Mylius' Philosophia reformata
  33. World Trade Center Ground Zero site under reconstruction Sept 8, 2011
  34. May Day, 1907
  35. A Prehistoric Mammoth Hunt
  36. Early American steam locomotive
  37. Bust of Socrates
  38. Pascal's calculator, 17th Century artwork
  39. The Krak des Chevaliers, Crusader castle, Syria, Middle East
  40. German astronomy atlas, 1882
  41. Department Of Justice Building In Washington D. C
  42. Silversmith at work, c.1914
  43. Check Up
  44. Newgrange, County Meath, Leinster, Republic of Ireland, Europe
  45. Civil War Poster Seeking Vermont 9Th Infantry Recruits
  46. Edison talking into his phonograph
  47. Woman standing at long row of bobbins, at a textile factory, Millville, NJ, 1936
  48. Crusader