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Updated: May 28, 2025
Sammy produced a private tuning-fork, black and grimy, which, being about seventy years of age, and wrought before pianoforte builders had sent up the pitch to make their instruments brilliant, was nearly a note flatter than the parson's. While an argument as to the true pitch was in progress, there came a knocking without. 'Somebody's at the door! said a little treble girl.
Here is another spiral similar in every respect to spiral C. This is in circuit with a battery and an ordinary mechanical make and break arrangement, the sound given off by which I will now make audible to you in the same way that I did the sound of the tuning-fork. Now you hear it.
'Anwendung, etc., 'Verh. d. n. V. Jahrg. xxix. p. 80. Mayer has recently ascertained that the hairs on the antennae of the male vibrate in unison with the notes of a tuning-fork, within the range of the sounds emitted by the female. The longer hairs vibrate sympathetically with the graver notes, and the shorter hairs with the higher ones.
If therefore the number of inches in 186,000 miles are multiplied by the 40,000, and the product is divided by the 500 times which the tuning-fork vibrates in one second, you have the number of seconds that tuning-fork must vibrate, before it has completed the number of impacts which, in one second of time, must fall on our retina to give us the impression of red light; and that tuning-fork would have to vibrate nearly twice as long, say 50,000 years, to reach the number of impulses which strike the eye in one second of time and give the impression of violet light; and between these two limits are situated the colours Orange, Yellow, Green, Blue, and Indigo.
We do not allow in our melodies any sounds that cannot be classified amongst the living voices of nature; whereas the modern Chinese tendencies are quite different. The Chinese system comprises eight chief tones, which serve as a tuning-fork to all derivatives; which are accordingly classified under the names of their generators.
Better yet, a chronograph which vibrates synchronously with a tuning-fork, whose motion is kept up by electricity, is put in the same place. We then let the shutter fall, when the little stylet will inscribe a certain number of vibrations.
Plumped with the rich red stream of life, this last of the squires of old England thumped along among the guests, a very tuning-fork to keep them at their pitch of enthusiasm. He encountered Mr. Caddis, and it was an encounter. Mr.
Mardon urged me again, and at last said "I believe you've never once heard Mary sing." Mary protested, and pleaded that as they had no piano, Mr. Rutherford would not care for her poor voice without any accompaniment. But I, too, protested that I should, and she got out the "Messiah." Her father took a tuning-fork out of his pocket, and having struck it, Mary rose and began, "He was despised."
But if it were, the only principle at work, there would be no music more beautiful than the tone of a tuning-fork. Such sounds, although delightful perhaps to a child, are soon tedious. The principle of purity must make some compromise with another principle, which we may call that of interest.
Close one or both ears, and you will hear it. Experiment 160. Listen to a ticking watch or a tuning-fork kept vibrating electrically. Close the mouth and nostrils, and take either a deep inspiration or deep expiration, so as to alter the tension of the air in the tympanum; in both cases the sound is diminished. Experiment 161.
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