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  1. Row of pencils on table
  2. Circulatory system and brain, artwork
  3. Malcolm X
  4. Vintage World War II poster featuring bombs falling
  5. The bones of the lower back
  6. Alaska - USGS State Mosaic
  7. Plane over Battersea Power Station
  8. 1910's UK Marshmallows Book Plate
  9. Ratcliffe Power Station
  10. Cyclopes
  11. Lumbar vertebra
  12. Lovecraft
  13. Bright Periodic Table - Navy, Classic Text
  14. Classical Montage
  15. Cross section biomedical illustrationBiomedical illustration of dental filling
  16. Charles Haddon Spurgeon (1834-92) engraved by D.J. Pound from a photograph
  17. Australia - USGS Earth as Art
  18. Shooting An Oil Well
  19. The Renaissance
  20. Mary Mcleod Bethune (1875-1955)
  21. Civil War, Atlanta, c1863
  22. Female human head with brain
  23. Yellowstone
  24. License Plate Periodic Table
  25. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  26. Molecular Fusion I
  27. Alphabet For Children, 2002
  28. Bright Periodic Table - Black, Classic Text
  29. Red Lancers of the French Old Guard, From Book, 'The Old Guard'
  30. Florida Everglades - USGS Earth as Art
  31. Joan of Arc hears heavenly voices in the Forest
  32. Rear view of acupuncture model
  33. Pythagoras Maths Equation
  34. Scanning electron micrograph of an apoptotic HeLa cell
  35. Muscular man running
  36. Can You Help Me Please
  37. Vermont - USGS State Mosaic
  38. Color Field
  39. George Washington hears his mother convince him not to go to sea as a midshipman
  40. Officers of 4th New Jersey Infantry, American Civil War
  41. American History print of President George Washington and his family
  42. Thel's Motto, plate 2 from The Book of Thel, 1789
  43. Waziristan Hills - USGS Earth as Art
  44. Printing Press
  45. Susan Brownell Anthony, c.1890-1906
  46. Conceptual image of DNA
  47. Act I, 2015
  48. Fortifications in front of Atlanta, Georgia, during the American Civil War