Across
- 3. Wright brothers' invention that achieved powered flight
- 6. the first machine for recording and playing back sound
- 7. practical, long-lasting light invented in 1879
Down
- 1. a handheld box that came preloaded with a 100-exposure roll of flexible paper film
- 2. electric-powered transport system
- 4. "talking telegraph" patented by Alexander Graham Bell in 1876
- 5. first gas-powered vehicle for transport, invented in 1886