Uncommon Inventions

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Across
  1. 4. – Device allowing underwater breathing
  2. 5. – Mask used during plague outbreaks
  3. 7. – Boat designed to skim across water
  4. 8. – System for transporting items through tubes
  5. 10. – Modular design concept used in construction
Down
  1. 1. – Early electronic component used in radios
  2. 2. – Early chess-playing automaton
  3. 3. – Camera stabilized by a gimbal mechanism
  4. 6. – Rigid airship used in early aviation
  5. 9. – Ancient instrument for measuring astronomical positions