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  1. A diagram showing the phases of the Earths moon
  2. Buffalo Hunt, 1830S
  3. Boho Periodic Table
  4. Plum Agate B
  5. Oil well pump jacks at Bakken Oil Field near Estevan, Saskatchewan, Canada
  6. Remington, Cowboys, 1888
  7. Grey Agate B
  8. Normal spine, X-ray
  9. Paul Revere By John Singleton Copley
  10. Portrait of Chief Red Cloud in headdress
  11. Tribute To Vikings
  12. Let Freedom Ring I
  13. Solar System - Minimal
  14. Brain, artwork
  15. Mathematical Elements I
  16. Portrait Of Harriet Tubman, 1870
  17. World War II: Headline, 1941
  18. Let Freedom Ring II
  19. John Coltrane Playing The Soprano Saxophone, 1960's
  20. Obama: Believe
  21. In A Stampede
  22. Old Brass', a native North American, 19th century
  23. Wild West
  24. Ra
  25. The Hare and the Tortoise, illustration from Aesop's Fables
  26. Solar system
  27. Portrait Of John Brown
  28. Light Bulb
  29. Elizabeth of Bourbon (1603-1644). Queen of Spain. Alcazar Castle, Segovia, Spain
  30. Saturn
  31. Ford Engine
  32. Benjamin Franklin's face on the Hundred Dollar Bill
  33. Earth Agate F
  34. Agate Studies III
  35. The First Reading of the Emancipation Proclamation Before the Cabinet
  36. Composite of 90 different species of parrots
  37. Constitution of the united states of america
  38. Attorney And Client, Fortitude And Impatience. Illustration From The Book Bleak House
  39. Civil War painting of Union and Confederate troops fighting at The Battle of Bull Run
  40. Gas Station 66, Wild West Painting Series
  41. Horse Chestnut - Botanical Illustration
  42. The Round-Up, 1888
  43. Math Formulas On Chalkboard
  44. Be Whoo You Are
  45. The lumbar vertebrae
  46. Apple Tree - Botanical Illustration
  47. Jupiter
  48. Martin Luther King, Jr. (1929-1968)