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" A stopcock was so constructed that it opened and shut the passage of a pipe 720 times in a second. The apparatus was fitted to the pipe of a conduit leading from the bellows to the wind-chest of an organ. The air was simply allowed to pass gently along... "
A System of Mechanical Philosophy - Síđa 400
eftir John Robison - 1822 - 50 síđur
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Iron: An Illustrated Weekly Journal for Iron and Steel ..., Bindi 11

Perry Fairfax Nursey - 1829 - 482 síđur
...opened and. shut the passage through a pipe 720 times in a second. This appa. ratus was fitted to tbe pipe of a conduit leading from the bellows to the...gently along this pipe, by the opening of the cock. The sound G in alt. was most smoothly uttered, equal in sweetness to a clear female voice. When tbe...
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Sound: A Course of Eight Lectures Delivered at the Royal Institution of ...

John Tyndall - 1867 - 404 síđur
...stopcock was so constructed that it opened and shut the passage of a pipe 720 times in a second. The apparatus was fitted to the pipe of a conduit leading...voice. When the frequency was reduced to 360, the sound was that of a clear, but rather a harsh man's voice. The cock was now altered in such a manner...
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Sound, 8 lectures

John Tyndall - 1875 - 466 síđur
...stopcock was so constructed that it opened and shut the passage of a pipe 720 times in a second. The apparatus was fitted to the pipe of a conduit leading...alt was most smoothly uttered, equal in sweetness to i When a rough tide rolls in upon a pebbled beach, as at Blackgang Chine or Freshwater Gate in the...
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Sound

John Tyndall - 1875 - 628 síđur
...stopcock was so constructed that it opened and shut the passage of a pipe 720 times in a second. The apparatus was fitted to the pipe of a conduit leading...this was repeated 720 times in a second, the sound ,J in alt was most smoothly uttered, equal in sweetness to 1 When a rough tide rolls in upon a pebbled...
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Sound

John Tyndall - 1884 - 474 síđur
...stopcock was so constructed that it opened and shut the passage of a pipe 720 times in a second. The apparatus was fitted to the pipe of a conduit leading...gently along this pipe by the opening of the cock. Wlien this was repeated 720 times in a second, the sound g in alt, was most smoothly uttered, equal...
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Sound

John Tyndall - 1902 - 490 síđur
...the opening of the cock. When this was repeated 720 times in a second, the sound Fio. 18. g in aft was most smoothly uttered, equal in sweetness to a...clear female voice. When the frequency was reduced to 860, the sound was that of a clear but rather a harsh man's voice. The cock was now altered in such...
Heildartexta - Um bókina

Library of universal knowledge, science, Bindi 7

1905 - 490 síđur
...stop-cock was so constructed that it opened and shut the passage of a pipe 720 times in a second. The apparatus was fitted to the pipe of a conduit leading...this was repeated 720 times in a second, the sound FIG. 18. g in alt was most smoothly uttered, equal in sweetness to a clear female voice. When the frequency...
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Sounds of Our Times: Two Hundred Years of Acoustics

Robert T. Beyer - 1999 - 472 síđur
...passage of a pipe 720 times in a second. The apparatus was fitted to the wind-chest of an organ.. . the sound g in alt was most smoothly uttered equal in sweetness to a clear female voice. When the sound was reduced to 360. . . the sound was more mellow than any man's voice of the same pitch. [9]...
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