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  1. Earth
  2. Solar System (Colored)
  3. Egyptian and Assyrian counting systems
  4. Study of the Human Figure, Lateral View
  5. Space Suit
  6. Pythagoras Maths Equation
  7. Leaded
  8. Blue Watercolor Agate Rectangle
  9. The Planet Saturn
  10. Malcolm X
  11. Malachite
  12. For Your Country's Sake Today - Women in the Armed Forces
  13. Knights charging into battle
  14. Florence Nightingale (1820-1910) illustration from World Noted Women
  15. Gem Stones I
  16. Desk Tools III
  17. Washington Crossing The Delaware On The Evening Previous To The Battle Of Trenton
  18. No Man's Land - USGS Earth as Art
  19. Vintage World War II poster featuring a fighter plane and a ship patrolling the sea
  20. Photograph of logarithmic slide rule
  21. Marley's Ghost. Illustration for the novella A Christmas Carol
  22. The Planet Earth
  23. Human brain anatomy, lateral view
  24. Chrysocolla
  25. Fascimile of a letter from Vincent Van Gogh to Emile Bernard on the 18th March 1888
  26. John Bunyan. Author Of the Pilgrim's Progress. From The Portrait By Sadler
  27. Stacked Agate I
  28. Abraham Lincoln, 1809 - 1865, 16th President Of The United States, Gettysburg Portrait
  29. Desk Tools I
  30. Teach on Mars and its Moons
  31. The Planet Jupiter
  32. Mathematical Elements II
  33. Indian Motor Cycle Ambulance
  34. Alberta, Reserve, c1890
  35. General Curtis LeMay and President Kennedy
  36. RMS Titanic: 1st Class Dining Saloon on D-Deck, 1912
  37. Shattuckite Jasper
  38. Frank Whittle's early development of the jet engine
  39. Ocean Jasper
  40. Oil well pump jacks at Bakken Oil Field near Estevan, Saskatchewan, Canada
  41. Mercury I
  42. Vintage Parchment Dentist Chair Patent Poster
  43. George And Martha Washington At Presidential Reception
  44. Andes - USGS Earth as Art
  45. Washing Gold, Calaveras, California, 1853
  46. Conceptual image of neuron
  47. The Battle Of Williamsburg, Virginia On May 5th 1862
  48. Blues Guitarist And Singer Rosetta Tharpe Playing Steel Guitar