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Updated: May 28, 2025
In order to know the time of exposure obtained we employ the following method, which permits of graduating an apparatus rapidly and with extreme precision: A band of smoked paper is fixed upon the shutter, then a tuning-fork provided with a small stylet resting against the paper is made to vibrate.
That the mouth can act as a resonator may be proved by holding a vibrating tuning-fork of suitable pitch before this chamber when open. The resonating chambers of importance are supra-glottic. Of these the "mouth" including all as far back as the pharynx and the nasal chambers are the principal.
All that is only sensation, if you will; but merely as the agglutinated molecules of cement and of stone are a palace. Thus the whole series of visual events which compose our experiment with the tuning-fork can be coherently explained. One understands that It is the movement of my hand equipped with the bow which is communicated to the tuning-fork.
It was finally understood that Haddam witches, who practised black magic, met the Moodus witches, who used white magic, in a cave beneath Mount Tom, and fought them in the light of a great carbuncle that was fastened to the roof. The noises recurred in 1888, when houses rattled in witch-haunted Salem, eight miles away, and the bell on the village church "sung like a tuning-fork."
Her voice was old and thin, like the high quavering of an imperfect tuning-fork, and her eyes were sharp as talons in their grasping glance. "Mademoiselle does not wish such a costume," gruffly responded Mephisto. "Ma foi, there is no other," said the ancient, shrugging her shoulders. "But one is left now; mademoiselle would make a fine troubadour."
Would you be so good as to bring me the bow of your violin, and borrow for me anywhere a tuning-fork of as high a note as possible?" The young man looked at Dr Lefevre in puzzled inquiry; but the doctor was considering the electrical apparatus before him, and the young man set off on his errands.
Fearful that her suddenly acquired fondness for singing might arouse suspicion and inquiry, she rarely practised at home unless Miss Jane were absent; and, having procured a tuning-fork, she retreated to the most secluded portion of the adjoining forest and rehearsed her lessons to a mute audience of grazing cattle, sombre pines, nodding plumes of golden-rod, and shivering white asters, belated and overtaken by wintry blasts.
It becomes important for the reader to convince himself of the importance of resonance in sounding bodies and musical instruments. When the stem of a tuning-fork so small that it can be scarcely heard when in vibration, except by, the person holding it, is laid against a solid body, as a table, its sound is at once so increased that it can be heard in the most distant part of a large room.
Through the still air comes from a distance a vibration as of a tuning-fork: a robin, perhaps, alighting on the wire of a broken fence. In the warm kitchen, where I dawdle over my breakfast, the widowed bantam-hen has perched on the back of my drowsy cat.
I see the left ear go forward and prepare for a desperate shy at that wheelbarrow. He knows a wheelbarrow familiarly there is one in his stall all day but I am taking him a road he does not want to go, and so the hypocrite is going to pretend that barrow is of a dangerous sort. I prepare to apply a counter-irritant: he sees it with the corner of his eye, and both ears turn back like a tuning-fork.
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