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