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  1. Zora Hurston Beating The Hountar (Mama Drum), 1937
  2. Moses and the Burning Bush
  3. Scottish regiment fighting German troops at Battle of Loos
  4. Bright Periodic Table - Black, Modern Text
  5. The Shipwrecked Man and the Sea, illustration from Aesop's Fables
  6. Brooklyn Window #25
  7. Sense of Wonder
  8. Technicians Wanted to Engineer our Future on Mars
  9. Teach on Mars and its Moons
  10. Arthritis of the hip, X-ray
  11. John Bunyan. Author Of the Pilgrim's Progress. From The Portrait By Sadler
  12. Distillation, 16th century woodcut
  13. Normal knee, X-ray
  14. Normal hip, X-ray
  15. Chain Of Molecules
  16. Malachite
  17. Anterior view and sagittal view of female urinary bladder
  18. Relief depicting a pharaoh making an offering, Temple of Luxor, Egypt
  19. Wilson Dam, Alabama, forms portion of the Tennessee River barge route
  20. Mineralogie I
  21. Graduated Cylinders And Flasks
  22. President John F. Kennedy visits with reporters
  23. Human brain anatomy, lateral view
  24. First Letter Carried By Pony Express
  25. Florida - USGS State Mosaic
  26. Study of the Human Figure, Anterior View
  27. Knocking-off time at the Harland
  28. Abraham Lincoln (1809-65) plans his campaign during the American Civil War (1861-65)
  29. Battle of Eylau, Napoleon orders Murat to Charge Russian Army
  30. World War I, Geography
  31. old-fashioned drawing compass
  32. 'Ar never gets off'
  33. Tennessee - USGS State Mosaic
  34. Title Page From The Luther Bible, C.1530
  35. Montana - USGS State Mosaic
  36. As Pandora Raised The Lid The Cottage Grew Very Dark. Illustration
  37. Assembly Required to Build Our Future on Mars and its Moons
  38. Scanning electron micrograph of HIV particles infecting a human T cell
  39. William II, Prince of Orange, and his Bride, Mary Stuart, 1641
  40. Conceptual image of DNA
  41. Signature Of Charles Dickens, 1812-1870. From The Book Bleak House
  42. Puerto Rico - USGS State Mosaic
  43. One, Two, Buckle my Shoe, from Old Mother Goose's Rhymes and Tales
  44. Solar System - Blue I
  45. Apollo 13
  46. Modern Geode IV
  47. Death's Door, illustration from 'The Grave, A Poem'
  48. Grey School Chalkboard With Many Different Formulas And Signs