Across
- 3. industry created by Edison
- 6. roads, _____, restaurants, and gas stations were needed
- 10. Henry Ford concentrated on producing this
- 11. process of car moving from person to person
- 13. invented the telephone
- 14. factories used coal to power this
- 15. used morse code
Down
- 1. phone service began in 1915
- 2. meant all parts were exactly alike
- 4. recorded and played back sound in tinfoil cylinders
- 5. Edison perfected its design
- 7. had invention factory in Menlo Park,NJ
- 8. workers could live here and drive to work
- 9. Bell worked with the
- 12. Bell wanted to transmit speech using this