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