uds obstructed sound. Acoustic clouds string telephones. is that they are often incapable of being consisted of layers of heated air with intermediate layers placed in the most convenient position. The curved speak- less heated. The lecturer formed an artificial cloud of the ing tube—which is also… … but simply absorbed by an These instruments are nice- BENNETT’S ACOUSTIC TELEPHONE, adjacent fork. In like man- ly finished, the mouth-piece, ner the yellow ray in the solar spectrum was absorbed by the Atlantic cables was also obstructed. At midnight crank, and other parts being nickel-plated.…
Internet Archive · Public domain (published before 1931). Free to use for anything.
