This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 edition. Excerpt: ... a given time. The greater the number of vibrations the higher the tone. Experiment 124.--Stretch a wire or catgut string tightly upon a sonometer (Fig. 129) (see Appendix, 4). Near the bridge A place another bridge, and move it toward B, stopping every two or three inches of distance and sounding the string. ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 edition. Excerpt: ... a given time. The greater the number of vibrations the higher the tone. Experiment 124.--Stretch a wire or catgut string tightly upon a sonometer (Fig. 129) (see Appendix, 4). Near the bridge A place another bridge, and move it toward B, stopping every two or three inches of distance and sounding the string. Is the pitch of each note the same? How does the number of vibrations the shortened string makes compare with the number it made before being shortened by the movable bridge? Experiment 125.--Take away the movable bridge, and attach a tin pail, C, to the string (Fig. 129). Put into the pail a weight of three or four pounds. Sound the string, noticing the tone. Put twice as much weight Fair results can be obtained by stretching the wire tightly lengthwise of a table or board, with the bridges arranged as stated above. into the pail, and again sound the string. Put in three times as much weight as at first and sound the string. What effect does increasing the tension have upon the pitch? How does the number of vibrations made by the string when last sounded compare with the number it made when it had less tension upon it? Experiment 126.Stretch upon the sonometer two strings of the same material and of such size that the diameter of one is about twice that of the other. Fasten to the end of each string the same amount of weight, so that the tension of each will be the same. Sound first one string and then the other. Which gives forth the higher note? Which string, then, makes the greater number of vibrations, the one having the larger or the one with the smaller diameter? The pitch of a vibrating string depends upon the length, the tension, and the size of the string. Experiment 127.--Pull a string on the sonometer. Produce a sound of...
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