Proceedings of the American Association for the Advancement of Science
Proceedings of the American Association for the Advancement of Science
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In our eReader you can find the full English version of the book. Read Proceedings of the American Association for the Advancement of Science Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Proceedings of the American Association for the Advancement of Science
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By Prof. Gbokgk S. Molbr and Dr. Fred- erick Bkdell, Cornell University, Ithaca, N. Y.
The instruments here included are two in number. The tlrstone, which has already been described,* consists of a small synchronous motor brought to speed by a crank handle connected with the motor by a suitable train of gears. The apparatus contains an electrioilly operated speed counter, so arranged that its reading gives the exact value of the frequency of the alternating current with which the synchronous m...otor is supplied. The whole apparatus does not weigh over nine pounds. The reading is correct to within .05 of an alternation.
The second instrument consists of a sonometer or monochord. The alter- nating current flows through a piano wire mounted upon a sounding board.
The wire passes between the poles of a permanent magnet. By means of a sliding bridge the period of the wire may be made equal to that of the alternating current. This is indicated by the vibration of the wire. A scale is arranged so that the posiHon of the bridge indicates the frequency directly.
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To quickly assess the difficulty of the text, read a short excerpt:
By Prof. Gbokgk S. Molbr and Dr. Fred- erick Bkdell, Cornell University, Ithaca, N. Y.
The instruments here included are two in number. The tlrstone, which has already been described,* consists of a small synchronous motor brought to speed by a crank handle connected with the motor by a suitable train of gears. The apparatus contains an electrioilly operated speed counter, so arranged that its reading gives the exact value of the frequency of the alternating current with which the synchronous m...otor is supplied. The whole apparatus does not weigh over nine pounds. The reading is correct to within .05 of an alternation.
The second instrument consists of a sonometer or monochord. The alter- nating current flows through a piano wire mounted upon a sounding board.
The wire passes between the poles of a permanent magnet. By means of a sliding bridge the period of the wire may be made equal to that of the alternating current. This is indicated by the vibration of the wire. A scale is arranged so that the posiHon of the bridge indicates the frequency directly.
What to read after Proceedings of the American Association for the Advancement of Science?
You can find similar books in the "Read Also" column, or choose other free books by American Association for the Advancement of Science to read onlineMoreLess
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