Elements of Sound: Light, and Heat

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Woolworth, Ainsworth & Company, 1868 - Physics - 301 pages

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Page 29 - Through the two floors passed a tin tube 2 \ inches in diameter, with a wooden rod inside of it, the end of which projected into the lecture-room. The rod was clasped by India-rubber bands which completely closed the tube. The lower end of the rod rested upon the sounding-board of the piano. The piano was played, and no sound was heard in the lecture-room ; but when a violin was placed against the end of the rod, it became musical, not with the vibrations of its own strings, but with those of the...
Page 286 - I cannot walk across the floor without agitating the flame. The creaking of my boots sets it in violent commotion. The crumpling or tearing of a bit of paper, or the rustle of a silk dress, does the same. It is startled by the patter of a rain-drop.
Page 286 - Her ivory forehead full of bounty brave, Like a broad table did itself dispread, For Love his lofty triumphs to engrave, ' And write the battles of his great godhead : All good and honour might therein be read; For there their dwelling was.
Page 64 - There are various ways of agitating the air at the ends of pipes and tubes, so as to throw the columns within them into vibration. In organ-pipes this is done by blowing a thin sheet of air against a sharp edge. This produces a flutter, some particular pulse of which is then converted into a musical sound by the resonance of the associated column of air.
Page 287 - If the most distant person in the room were to favor me with a hiss, the flame would instantly sympathize with him. A hiss contains the elements that most forcibly affect this flame. The gas issues from its burner with a hiss, and an external sound of this character is therefore exceedingly effective. I hold in my hand a metal box, containing compressed air. I turn the cock for a moment, so as to allow a puff to escape, — the flame instantly ducks down, not by any transfer of air from the box to...
Page 282 - ... seems to be secured, so that for ourselves and for long generations after us we have nothing to fear. But the same forces of air and water, and of the volcanic interior, which produced former geological revolutions, and buried one series of living forms after another, act still upon the earth's crust. They more probably will bring about the last day of the human race than those distant cosmical alterations of which we have spoken...
Page 284 - I observed that the flame of the last-mentioned burner exhibited pulsations in height which were exactly synchronous with the audible beats. This phenomenon was very striking to every one in the room, and especially so when the strong notes of the violoncello came in. It was exceedingly interesting to observe how perfectly even the trills of this instrument were reflected on the sheet of flame. A deaf man might have seen the harmony.
Page 282 - ... bloomed, and dropped its costly gum on the earth and in the sea ; when in Siberia, Europe, and North America groves of tropical palms flourished ; where gigantic lizards, and after them elephants, whose mighty remains we still find buried in the earth, found a home? Different geologists, proceeding from different premises, have sought to estimate the duration of the above-named...
Page 286 - All good and honour might therein be read; For there their dwelling was. And when she spake. Sweet words like dropping honey she did shed; And twixt the pearls and rubies softly brake A silver sound, that heavenly music seem'd to make.
Page 206 - ... found that only about .001 as much heat is radiated through the tube as at first. This shows that different gases absorb the same quality of heat very differently. The following table is taken from Tyndall : — Absorption under Name of Gas. a pressure of one atmosphere. Air I Oxygen I Nitrogen I Hydrogen i Chlorine 39 Hydrochloric acid 62 Carbonic oxide 90 Carbonic acid 90 Nitrous oxide 355 Sulphide of hydrogen 390 Marsh gas 403 Sulphurous acid 710 Olefiant gas 970 Ammonia 1195...

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