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  1. A diagram showing the phases of the Earths moon
  2. Grey Agate B
  3. Rhodochrosite Mineral From China's Wuton Mine
  4. Remington, Cowboys, 1888
  5. Let Freedom Ring I
  6. Normal spine, X-ray
  7. Plum Agate B
  8. Solar System - Minimal
  9. Portrait of Chief Red Cloud in headdress
  10. Tribute To Vikings
  11. The First Reading of the Emancipation Proclamation Before the Cabinet
  12. Oil well pump jacks at Bakken Oil Field near Estevan, Saskatchewan, Canada
  13. Mathematical Elements I
  14. Paul Revere By John Singleton Copley
  15. The Doctrine of Monroe
  16. Buffalo Hunt, 1830S
  17. Old Brass', a native North American, 19th century
  18. World War II: Headline, 1941
  19. The Hare and the Tortoise, illustration from Aesop's Fables
  20. In A Stampede
  21. Lincoln's Gettysburg Address
  22. Light Bulb
  23. Wild West
  24. Earth Agate F
  25. Portrait Of John Brown
  26. John Coltrane Playing The Soprano Saxophone, 1960's
  27. Agate Studies III
  28. Saturn
  29. Elizabeth of Bourbon (1603-1644). Queen of Spain. Alcazar Castle, Segovia, Spain
  30. Solar system
  31. Benjamin Franklin's face on the Hundred Dollar Bill
  32. Ford Engine
  33. Let Freedom Ring II
  34. Boho Periodic Table
  35. Composite of 90 different species of parrots
  36. Horse Chestnut - Botanical Illustration
  37. Attorney And Client, Fortitude And Impatience. Illustration From The Book Bleak House
  38. Apple Tree - Botanical Illustration
  39. Multiphoton fluorescence image of HeLa cells
  40. The Round-Up, 1888
  41. Civil War painting of Union and Confederate troops fighting at The Battle of Bull Run
  42. The lumbar vertebrae
  43. Math Formulas On Chalkboard
  44. Be Whoo You Are
  45. Obama: Believe
  46. Electric Coloured Sky
  47. Jupiter
  48. Ra