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" A stopcock was so constructed that it opened and shut the passage of a pipe 720 times in a second. Air from the wind-chest of an organ being allowed to pass along the pipe during the rotation of the cock, a musical sound was most smoothly uttered. "
Sound, 8 lectures - Page 55
by John Tyndall - 1867
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A System of Mechanical Philosophy, Volume 4

John Robison - Astronomy - 1822 - 50 pages
...was so constructed, that it opened and shut the passage through a pipe 720 times in a second. This apparatus was fitted to the pipe of a conduit leading...organ. The air was simply allowed to pass gently along tfu's pipe by the opening of the cock. When this was repeated 720 times in a second, the sound g in...
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A System of Mechanical Philosophy, Volume 4

John Robison - Astronomy - 1822 - 50 pages
...chirrup. An experiment was made, which was less promising of a sound than any that can be thought of. A stop-cock was so constructed, that it opened and shut the passage through a pipe 720 times in a second. This apparatus was fitted to the pipe of a conduit leading from...
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Iron: An Illustrated Weekly Journal for Iron and Steel ..., Volume 11

Perry Fairfax Nursey - Industrial arts - 1829
...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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Report of a Tour of Inspection of European Lighthouse Establishments, Made ...

George H. Elliot, William A. Richardson - Lighthouses - 1874 - 288 pages
...was first realized by Doctor Robisou, and his device was the first and simplest form of the siren. A stop-cock was so constructed that it opened and shut the passage of a pipe seven hundred and twenty times in a second. Air being allowed to pass intermittently along the pipe...
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The Cincinnati Quarterly Journal of Science, Volume 2

Science - 1875
...air was first realized by Dr. Robinson, and his device was the first and simplest form of the siren. A stop-cock was so constructed that it opened and shut the passage of a pipe 720 times in a second. Air from the wind-chest of an organ being allowed to pass along the pipe during the rotation of the...
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The Year-book of Facts in Science and Art

Charles W. Vincent, James Mason - Science - 1875
...tympanic shocks by pulls of air was first realized by Dr. j Robison. A stopcock was so con- j structed that it opened and shut the passage of a pipe 720 times in a' second. Air from the wind-cheat of : an organ being allowed to pass along I the pipe during the rotation of...
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Knight's American Mechanical Dictionary: A Description of Tools ..., Volume 3

Edward Henry Knight - Industrial arts - 1876 - 2831 pages
...was first realized by Dr. Rob, inson, and his device was the first and simplest form of the siren. A stop-cock was so constructed that it opened and shut the passage of a pipe 720 times in a second. Air from the wind-chest of an organ being allowed to pass along the pipe during the rotation of the...
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The Popular Science Monthly, Volume 6

Science - 1875
...air was first realized by Dr. Robinson, and his device was the first and simplest form of the siren. A stopcock was so constructed that it opened and shut the passage of a pipe 720 times in a second. Air from the wind-chest of an organ being allowed to pass along the pipe during the rotation of the...
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Sounds of Our Times: Two Hundred Years of Acoustics

Robert T. Beyer - Science - 1999 - 444 pages
...1799, John Robison developed a controllable sound source. Tyndall described Robison's work as follows: A stop-cock was so constructed that it opened and...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...
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Parliamentary Papers, Volume 60

Great Britain. Parliament. House of Commons - Bills, Legislative - 1874
...air was first realised by Dr. Robison, and his device was the first and simplest form of the syren. A stop-cock was so constructed that it opened and shut the passage of a pipe 720 times in a second. Air being allowed to pass intermittently along the pipe by the rotation of the cock, " a musical sound...
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