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  1. Rhodochrosite Mineral From China's Wuton Mine
  2. Normal spine, X-ray
  3. A diagram showing the phases of the Earths moon
  4. Vintage Civil War print of the Battle of Gettysburg
  5. Portrait Of Harriet Tubman, 1870
  6. Remington, Cowboys, 1888
  7. Let Freedom Ring I
  8. Constitution of the united states of america
  9. Solar System - Minimal
  10. Tribute To Vikings
  11. Portrait of Chief Red Cloud in headdress
  12. Oil well pump jacks at Bakken Oil Field near Estevan, Saskatchewan, Canada
  13. The Doctrine of Monroe
  14. Plum Agate B
  15. Earth Agate F
  16. Buffalo Hunt, 1830S
  17. Old Brass', a native North American, 19th century
  18. Mathematical Elements I
  19. World War II: Headline, 1941
  20. Lincoln's Gettysburg Address
  21. Solar system
  22. The Hare and the Tortoise, illustration from Aesop's Fables
  23. Wild West
  24. Benjamin Franklin's face on the Hundred Dollar Bill
  25. Agate Studies III
  26. Saturn
  27. Portrait Of John Brown
  28. Ford Engine
  29. Light Bulb
  30. The First Reading of the Emancipation Proclamation Before the Cabinet
  31. Paul Revere By John Singleton Copley
  32. Let Freedom Ring II
  33. John Coltrane Playing The Soprano Saxophone, 1960's
  34. Composite of 90 different species of parrots
  35. Attorney And Client, Fortitude And Impatience. Illustration From The Book Bleak House
  36. Horse Chestnut - Botanical Illustration
  37. Obama: Believe
  38. Multiphoton fluorescence image of HeLa cells
  39. The Round-Up, 1888
  40. Apple Tree - Botanical Illustration
  41. The lumbar vertebrae
  42. Civil War painting of Union and Confederate troops fighting at The Battle of Bull Run
  43. Martin Luther King, Jr. (1929-1968)
  44. Math Formulas On Chalkboard
  45. Be Whoo You Are
  46. Jupiter
  47. Electric Coloured Sky
  48. Ra