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  1. Signature Of Charles Dickens, 1812-1870. From The Book Bleak House
  2. Puerto Rico - USGS State Mosaic
  3. Knocking-off time at the Harland
  4. Venus
  5. To Polish The Sun
  6. Get Ahead! Adult Education Classes: For Adults at No Charge - WPA Poster
  7. The human body with superimposed colored plates by Julien Bougle
  8. The Los Angeles Times announcing the end of World War I, 1918
  9. California, Palm Springs. Windmill Farm along North Indian Canyon Drive
  10. Anti Child Labor Poster, 1913
  11. Pile of paperback books on desk in school library.
  12. The building of the Union Pacific Railroad
  13. Solar System - Blue I
  14. Scottish regiment fighting German troops at Battle of Loos
  15. Fun Facts about the U.S. Presidents
  16. As Pandora Raised The Lid The Cottage Grew Very Dark. Illustration
  17. Rugged Terrain - USGS Earth as Art
  18. Be Creative
  19. Lion and Gladiator
  20. Robinson Crusoe and his pets. From Adventures of Robinson Crusoe, published 1908
  21. The Transfiguration
  22. Golden Pharoah
  23. Cardiovascular system, artwork
  24. Dragon Lake - USGS Earth as Art
  25. Silversmith at work, c.1914
  26. Military camp with soldiers in street during the American Civil War
  27. Archaeopteryx
  28. The Pirates of Penzance
  29. Colours That Reflect Joy
  30. Vintage World War II poster featuring a fedora and an Army helmet
  31. President John F. Kennedy visits with reporters
  32. Lady Bell Plant Pollen
  33. Annunciation to the Shepherds. Book of Hours of Leonor de la Vega. 1465-70
  34. The cervical vertebrae
  35. The nerve supply of the upper body
  36. Christian's Conflict With Apollyon. From The Book The Pilgrim's Progress
  37. Conceptual image of platelets with red blood cells
  38. Okavango Delta - USGS Earth as Art
  39. Mineralogie III
  40. Virginia - USGS State Mosaic
  41. Civil War, Bull Run, 1861
  42. The Sun
  43. Vintage print of Presidents James Garfield, Abraham Lincoln, and William McKinley
  44. Yutyrannus huali is a feathered tyrannosauroid from the Early Cretacous of China
  45. Marsupials
  46. Beer, the Hop Plant, 1836
  47. Mae Jemison (1956- )
  48. President John F. Kennedy signing the Equal Pay Act