Across
- 3. Lightning rod
- 5. Research in radioactivity / radium applications
- 7. The diesel engine
- 8. Steam engine improvements
- 9. Early concepts of helicopter & parachute
- 10. Nuclear Bomb
Down
- 1. First powered airplane (brothers)
- 2. Telephone
- 4. Thermoscope / improvements to the telescope
- 6. Light bulb