This section is from the book "The Engineer's And Mechanic's Encyclopaedia", by Luke Hebert. Also available from Amazon: Engineer's And Mechanic's Encyclopaedia.
The loudest of all portable wind instruments; of which there are various kinda. In their most simple form, they consist of a metallic tube, with a large bell-shaped aperture at one end for the emission of the sound, and a mouth-piece at the other, adapted for blowing into it by the lips. See the words Ear-trumpet and Speaking-trumpet.
 
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