33

12345678910111213141516171819202122232425
Across
  1. 3. Star navigation tool
  2. 4. Farming tool
  3. 5. Power source
  4. 7. Roman architectural element
  5. 10. Grain grinder
  6. 11. Shaping tool
  7. 12. Egyptian paper
  8. 14. Timekeeping device
  9. 15. Timekeeping system
  10. 20. Ceramic tool
  11. 21. Siege weapon
  12. 23. Early writing
  13. 24. Ancient vehicle
  14. 25. Early transport invention
Down
  1. 1. Ancient calculator
  2. 2. Heating source
  3. 6. Blacksmith tool
  4. 8. Navigation tool
  5. 9. Simple machine
  6. 13. Gutenberg's press
  7. 16. Water transport
  8. 17. Roman water channels
  9. 18. Lifting mechanism
  10. 19. Early book form
  11. 22. Metalworking tool