Across
- 4. Who invented the grenade?
- 5. What was the maxim gun?
- 6. What did the Wright brothers invent?
- 7. Who invented the windshield wiper?
- 9. Who invented the first steel plow?
- 10. What did James watt improve?
Down
- 1. What gas did they use to fly zeppelins?
- 2. What did Hiram Maxim invent?
- 3. This invention was for cleaning car windshields.
- 8. This is a hand throw weapon.