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  1. Artillery drill in fort during the American Civil War
  2. President Kennedy greets Peace Corps Volunteers on the White House South Lawn
  3. Definition of anthropology
  4. The Earth's Annual Orbit
  5. Joan of Arc hears heavenly voices in the Forest
  6. 'London', plate 38 from 'Songs of Experience', 1794
  7. Mission Santa Ynez or Ines, Solvang, California
  8. Conceptual image of chromosome
  9. Brachiosaurus
  10. Human bones
  11. That Dam Cloud
  12. Ida B. Wells, 1891
  13. Joachim Murat Reviews a Company of Black Soldiers in Koenigsberg
  14. The Man and the Alembic
  15. Conceptual image of DNA
  16. Conceptual image of human lungs and rib cage
  17. Conceptual image of DNA
  18. Comet of 1811, 19th century artwork
  19. Conceptual image of influenza causing flu
  20. Microscopic view of plant tissues
  21. Old Mother Hubbard, from Old Mother Goose's Rhymes and Tales
  22. Ceratosaurus
  23. Humpty Dumpty
  24. Portrait of Anton Chekhov (1860-1904) 1902
  25. Shooting An Oil Well
  26. The muscles of the hand
  27. Soybeans, early growth, Minnesota
  28. Human skeleton
  29. Vintage American history print of a younger President Theodore Roosevelt
  30. California - USGS State Mosaic
  31. Waziristan Hills - USGS Earth as Art
  32. Portrait of Henry Knox (1759-1806)
  33. Apatosaurus
  34. Battle of Waterloo, June 18, 1815, 3rd Grenadier of Guard commanded by Cambronne
  35. Women working in a munitions factory in 1915
  36. Abstract Alphabet
  37. 1980's UK Womans Weekly Magazine Cover
  38. Mankind in the Making
  39. ABCs
  40. Human Skin
  41. Euoplocephalus
  42. Body Plans of Extinct Reptiles
  43. Artist's concept depicting the evolution of a lobe-finned fish to an amphibian
  44. Science classroom
  45. School Days
  46. Royal Court of French King Francis I at the Castle of Blois
  47. Chalkboard with greetings written in English, French and German
  48. Lifecycle of a Frog