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  1. Sioux Grass Dance, c1913
  2. Molecule Ethanol
  3. Arthritis of the neck, X-ray
  4. The Historic Meeting Of The Union High Command During The American Civil War
  5. External auditory canal of human ear (with labels)
  6. Pythagoras Maths Equation
  7. Chrysocolla
  8. John Brown on 30 August 1856 intercepting a body of pro-slavery men
  9. Egyptian and Assyrian counting systems
  10. Soap bubbles on a dodecahedral frame
  11. Blackfoot Native American
  12. Bright Periodic Table - White, Modern Text
  13. Malachite
  14. Microphone
  15. Van Gogh from Space - USGS Earth as Art
  16. The Fir-Tree and the Bramble, illustration from Aesop's Fables
  17. Hey Diddle, Diddle, from Old Mother Goose's Rhymes and Tales
  18. Close Ups Of Fortification On Crazy Lace Agate
  19. Earth
  20. Oil Pump Jacks On Canadian Prairie At Dusk, Carlyle, Saskatchewan, Canada
  21. The Fox and the Rooster
  22. The Fox and the Grapes, Selected Fontaine's Fables
  23. Fascimile of a letter from Vincent Van Gogh to Emile Bernard on the 18th March 1888
  24. Signal Hill Oil Derricks
  25. Mohawk Village, 1780
  26. George Washington, by Gilbert Stuart (Vaughan-Sinclair portrait), 1795
  27. Microscope
  28. Inquiry in the Loss of the Titanic: Cross sections of the ship
  29. Armillary sphere
  30. The Nina, Pinta, And Santa Maria
  31. How the Titanic Survivors Were Picked Up by the Carpathia
  32. Hand doing math homework
  33. Bogda Mountains - USGS Earth as Art
  34. Portrait Of Harriet Tubman, 1868-69
  35. Petrarch. Italian poet. The in Triumph of Love (15th c.) National Library, Madrid
  36. Conceptual image of neuron
  37. William Shakespeare at the Age 34, By Louis Coblitz, c.1830-60, German, oil on canvas
  38. Vintage Civil War print of Abraham Lincoln riding on horseback as a crowd cheers
  39. Hudson River, Military Map
  40. Alice in the Looking Glass House, from 'Through the Looking Glass' by Lewis Carroll
  41. The Underground Railroad Aids With A Runaway Slave
  42. Earth Agate A
  43. World War II painting of Winston Churchill wearing his RAF uniform
  44. Flying Machine, drawing by Leonardo da Vinci. Ca. 1488
  45. Stethoscope
  46. Mushroom Chart I light
  47. Hebrew Bible, 1299. Ark of the Covenant open showing Tablets of the Law
  48. The Lion, Jupiter and the Elephant, illustration from Aesop's Fables