Assertion: concertina's reed | /r/MadeOf | narrow tongues of brass
Facets:
Source sentences:
text: These free reeds consist of narrow tongues of brass riveted by one end to the inside surface of the keyboard,, and having their free ends slightly bent, some outwards, some inwards, the former actuated by suction when the bellows are expanded, the latter by compression.
text: These free reeds consist of narrow tongues of brass riveted by one end to the inside surface of the keyboard, and having their free ends slightly bent, some outwards, some inwards, the former actuated by suction when the bellows are expanded, the latter by compression.