Across
- 1. a machine with keys for producing alphabetical characters, numerals, and typographical symbols one at a time on paper inserted round a roller
- 4. a timing device with two connected glass bulbs containing sand that takes an hour to pass from the upper to the lower bulb
- 6. used as a washing tool in the 19th century
- 7. a type of gun with a lock in which a piece of wick or cord is placed for igniting the powder
- 8. an instrument showing the time by the shadow of a pointer cast by the sun on to a plate marked with the hours of the day
- 11. the earliest known device to record sound
Down
- 2. an early form of gramophone using cylinders and able to record as well as reproduce sound.
- 3. a home video format and the first commercial optical disc storage medium
- 5. a portable cassette player that allowed people to listen to music of their choice on the move
- 9. an electric monowheel vehichle invented back in 1930
- 10. a casette used in the 19th century in the format of magnetic tapes