great history inventions

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Across
  1. 3. Engine Industrialization
  2. 5. Broadcast
  3. 7. Transportation
  4. 8. Power
  5. 9. Warfare
  6. 10. Information
  7. 12. Press Books
  8. 13. Bulb Illumination
  9. 14. Mobility
  10. 15. Flight
Down
  1. 1. Photography
  2. 2. Medicine
  3. 4. Observation
  4. 6. Preservation
  5. 11. Communication