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  1. Modern Geode IV
  2. Keyboard Keys
  3. Caribbean Luxury - USGS Earth as Art
  4. General Philip Kearny's fatal charge at the Battle of Chantilly
  5. Paul Charles Morphy (1837-84) engraved by D.J. Pound from a photograph
  6. Malachite
  7. Tuberculosis, Don't Kiss Me!: Your Kiss of Affection, the Germ of Infection - WPA Poster
  8. Sailors on deck of USS Mendota gun boat during American Civil War
  9. Brooklyn Window #25
  10. Moses and the Burning Bush
  11. Teach on Mars and its Moons
  12. Discovery Hind Leg Of The Dinosaur Diplodocus, By Henry Fairfield Osborn In 1898
  13. John Bunyan. Author Of the Pilgrim's Progress. From The Portrait By Sadler
  14. Knocking-off time at the Harland
  15. Technicians Wanted to Engineer our Future on Mars
  16. Gem Stones III
  17. Normal hip, X-ray
  18. Chain Of Molecules
  19. old-fashioned drawing compass
  20. Anterior view and sagittal view of female urinary bladder
  21. Graduated Cylinders And Flasks
  22. Study of the Human Figure, Anterior View
  23. Distillation, 16th century woodcut
  24. Scanning electron micrograph of HIV particles infecting a human T cell
  25. Tennessee - USGS State Mosaic
  26. As Pandora Raised The Lid The Cottage Grew Very Dark. Illustration
  27. President John F. Kennedy signing the Equal Pay Act
  28. Title Page From The Luther Bible, C.1530
  29. Relief depicting a pharaoh making an offering, Temple of Luxor, Egypt
  30. Montana - USGS State Mosaic
  31. Battle of Eylau, Napoleon orders Murat to Charge Russian Army
  32. First Letter Carried By Pony Express
  33. Conceptual image of DNA
  34. 'Ar never gets off'
  35. Signature Of Charles Dickens, 1812-1870. From The Book Bleak House
  36. Death's Door, illustration from 'The Grave, A Poem'
  37. Solar System - Blue I
  38. One, Two, Buckle my Shoe, from Old Mother Goose's Rhymes and Tales
  39. Anti Child Labor Poster, 1913
  40. Grey School Chalkboard With Many Different Formulas And Signs
  41. Apollo 13
  42. The Transfiguration
  43. The human body with superimposed colored plates by Julien Bougle
  44. California, Palm Springs. Windmill Farm along North Indian Canyon Drive
  45. Pile of paperback books on desk in school library.
  46. Dragon Lake - USGS Earth as Art
  47. Volcanoes - USGS Earth as Art
  48. The cervical vertebrae