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FAVORITE SONUS TOR SCHOOL. AND HOME. |
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ALL structures, large or small, simple or complex, ftave a definite rate of vibration depending on their material, size and shape, as the fundamental note of a musical chord. At one time considerable annoyance was experienced in one of the mills in Lowell. Some days the mill was so shaken that a pail of water would be nearly emptied, while on other days all was quiet. Experiment proved it to be only when the ma�chinery was running at a certain rate that the build�ing was disturbed. The simple remedy was in run�ning it slower or faster, so as to put it out of tune with the building. We have here the reason of the |
rule observed by marching armies when they cross a bridge�viz., stop the music, break step, and open col�umn, lest the measured cadence of a condensed mass of men should cause the bridge to vibrate beyond its sphere of cohesion. The Broughton bridge gave way beneath the measured tramp of only sixty men. Tyn-dall tells us that, the Swiss muleteers tie up the bells of their mules, lest the tinkle bring down an avalanche. The breaking of a drinking glass by the human voice is a well-attested fact, and Chlanni mentions an inn�keeper who frequently repeated this interesting exper�iment for the entertainment of his guests.�Lovering, |
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THE SNOW-BIRD.
AlUgre. |
Rev. F. C Woodworth |
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"Poor fellow t he walks in the snow and the sleet, And has neither stockings nor shoes on his feet; I pity him so ! for how cold he must be! And yet he keeps singing his chick-a-dee-dee.�Cho.
"If I were a bare-footed snow-bird, I know I would not stay out in the cold and the snow, I wonder what makes him so full of his glee; He's all the time singing that chick-a-dee-dee.
**0 mother ! do get him some stockings and shoes, A frock, with a cloak and a hat, if he choose; I wish he'd come into the parlor, and see How warm we would make him, poor chick-a-dee-dee, |
The bird had flown down for some crumbs of bread, And heard every word little Emily said: "What a figure I'd make in that dress!" thought he. And he laughed, as he warbled his chick-a-dee-dee.
"I am grateful," he said, "for the wish you express, But I've no occasion for such a fine dress; I had rather remain with my limbs all so free, Than to hobble about, singing chick-a-dee-dee.
"There is One, my dear child, tho' I can not tell Has clothed me already, and warm enough too. Good-morning 1 O who are so happy as we ?" And away he went, singing his chick-a-dee-dee. |
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