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  1. Pills being poured into a bottle after counting
  2. Pipetting
  3. Pregnancy
  4. Preparing sample vials
  5. Digitally restored vector war propaganda poster. Defense Bond Stamps
  6. Scoliosis of the spine, artwork
  7. Sets of fingerprints
  8. Skull anatomy
  9. Spanner and nuts
  10. Spinal bones and ligaments
  11. Spine and spinal nerves,computer artwork
  12. Stethoscope
  13. Syringes
  14. Digitally restored vector war propaganda poster. Buy War Bonds
  15. Thomas Edison, US inventor
  16. Torso bones
  17. Digitally restored vector war propaganda poster. Buy Bonds Every Payday
  18. View of assorted dental equipment
  19. Woman's eye
  20. xDNA molecule
  21. xDNA molecule
  22. Zenobe Gramme
  23. Digitally restored vector war propaganda poster. Because someone talked!
  24. Artwork showing the pupil of eye in varying light
  25. Close-up of an electronic circuit board
  26. Digitally restored vector war propaganda poster. Be Patriotic
  27. Digitally restored vector war propaganda poster. Back The Attack, Buy War Bonds
  28. Digitally restored vector war propaganda poster. America needs your scrap rubber
  29. Digitally restored vector war propaganda poster. 85 million Americans hold war bonds
  30. Digitally restored vector war propaganda poster. 6th War Loan
  31. Eye anatomy, artwork
  32. Digitally restored vector war propaganda poster. Protect them now
  33. Eye retina
  34. Hazardous chemicals
  35. Heathkit computer wires
  36. Illustration of rods and cones in the retina
  37. Illustration of the human placenta
  38. Inner ear
  39. Digitally restored vector war propaganda poster. Don't Get Hurt!
  40. Light bulb filament
  41. Motor neurone nerve cell and synapses
  42. Neutrino detector
  43. Red blood cells and molecules, artwork
  44. Red blood cells, SEM
  45. Robot arm spot-welding a car suspension unit
  46. Digitally restored vector war propaganda poster - United we are strong
  47. Sun and its planets
  48. V-2 rocket launch in USA