A crossword exploring rare and unusual instruments used throughout history for communication.
Echoes of Forgotten Communication Devices
A crossword exploring rare and lesser-known instruments used throughout history for unique communication.
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Across
- 1. Instrument transmitting sound without electricity
- 2. Communication using varied drum patterns
- 3. Knotted strings used by the Incas for data
- 5. Signals ships with powerful rotating light
- 7. Signal using fire on hills or towers
- 13. Visual signaling system using flags or arms
- 14. Nautical system using flags to communicate
- 15. Early network for sending text messages
Down
- 4. Bird used historically to carry messages
- 6. Mechanical tool for encoding secret messages
- 8. System using birds for message delivery
- 9. Device signaling by reflecting sunlight
- 10. Early device for long-distance text messages
- 11. Early device that recorded and reproduced sound
- 12. Instrument transmitting messages via rhythm
- 16. Used historically to send audio signals
- 17. Inventor linked to wireless telegraphy
- 18. Ancient ram’s horn used to send sound messages
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