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  1. Rorschach Inkblot Test
  2. Standard electrical circuit symbols
  3. Sherlock Holmes and Dr. Watson
  4. Spine anatomy
  5. Spine anatomy
  6. Development of the English alphabet
  7. Durer's Rhinoceros, 1515
  8. Butterflies, artwork
  9. Rhazes, Islamic scholar
  10. Flame emission spectra of alkali metals
  11. Foot anatomy by Leonardo da Vinci
  12. Hummingbirds, historical artwork
  13. Muscles of the side and back
  14. Newton's optics
  15. Table comparing ancient scripts
  16. Nicolaus Copernicus, Polish astronomer
  17. Early electrical equipment
  18. Newspaper printing press
  19. Bees
  20. 16th century map of Venice
  21. Egyptian and Assyrian counting systems
  22. 19th century chart of ocean currents
  23. Olive trees, Puglia, Italy, Europe
  24. Body musculature
  25. Shelduck, historical artwork
  26. Native American census roll, artwork
  27. 19th Century electrical equipment
  28. Body musculature
  29. Foot bones
  30. Francesco Sforza, military leader
  31. Egyptian creation myth
  32. Young hare, by Durer
  33. Facial nerves
  34. Sandpiper, historical artwork
  35. Redshank, historical artwork
  36. Computer hard disk assembly
  37. Durer's Celestial Globe, 1515
  38. Phrenology chart
  39. Anglo-Saxon 10th century world map
  40. Torso bones
  41. Table from Becher's 'Opuscula chymica'
  42. Johannes Kepler and Tycho Brahe
  43. Tawny owl, historical artwork
  44. 1920s television system, diagram
  45. Homeric cosmogony
  46. Development of Arabic numerals
  47. Acoustic echo
  48. Features of fingerprints