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  1. Molecule Caffeine
  2. Total Eclipses of Sun and Moon's Shadow
  3. Vitruvian Skeleton
  4. Australia, Northern Territory, Arnhem Land, Mt Borradaile, rock paintings
  5. Animal Life Spans
  6. The nerve supply of the trunk
  7. The bones of the neck
  8. Multi-Life
  9. Andrew Jackson, by Thomas Sully, 1845
  10. Oil well pump jacks at Bakken Oil Field near Estevan, Saskatchewan, Canada
  11. The vertebral column
  12. French Counter-Attack at Village of Vaux near Verdun, 1916
  13. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  14. The Fishers of Men
  15. Projecting Kinetoscope
  16. Normal shoulder, X-ray
  17. The four terrestrial planets compared in scale
  18. We Need You
  19. Remington, Cowboys, 1888
  20. Edwin Hubble's Galaxy Classification System
  21. Illustrated USA
  22. Vintage Civil War print of President Abraham Lincoln and his cabinet
  23. Vintage Civil War print of General Sherman and his Generals on horseback
  24. Inquiry in the Loss of the Titanic: Cross sections of the ship
  25. Caduceus and graph
  26. Chrysocolla
  27. Agate Geode I
  28. The Tea Party
  29. Normal spine, X-ray
  30. Apache On Horseback, c1903
  31. Unidentified Viking scene with longship aflame
  32. The Planets, excluding Pluto
  33. Rhodochrosite Mineral From China's Wuton Mine
  34. A composite showing different stages of the 2010 solstice total moon eclipse
  35. Oregon. Close-up of Graveyard Point Plume Agate stone
  36. Purple Watercolor Agate I
  37. Garden Tulip - Botanical Illustration
  38. Moss Agate
  39. Electric Coloured Sky
  40. View looking from inside the mouth while at the dentist
  41. Gas Station, Wild West Painting Series
  42. Watercolor Agate I
  43. Map of England, Britannia Antiqua
  44. Paul Revere By John Singleton Copley
  45. Teacher's desk in classroom
  46. Hairdresser
  47. Grammar Lesson
  48. Vintage Civil War print of Abraham Lincoln riding on horseback as a crowd cheers