 | John Tyndall - 1867 - Страниц: 372
...swaying to and fro. Thus, also, we send sound through the air, and shake the drum of a distant ear, while each particular particle of the air concerned in the...transmission of the pulse makes only a small oscillation. Scientific education ought to teach us to see the invisible as well as the visible in nature ; to picture... | |
 | Bernard Cracroft - 1868 - Страниц: 348
...swaying to and fro. Thus, also, we send sound through the air, and shake the drum of a distant ear, while each particular particle of the air concerned in the...transmission of the pulse makes only a small oscillation." Professor Tyndall adds : — " Scientific education ought to teach us to see the invisible as well... | |
 | 1876 - Страниц: 848
...swaying to and fro. Thus, also, we send sound through the air, and shake the drum of a distant ear, while each particular particle of the -air concerned in...transmission of the pulse makes only a small oscillation.* Ina similar way the particles of air which fill the cavity of the ear are finally driven against the... | |
 | Alexander Wilford Hall - 1878 - Страниц: 300
...swaying to -and fro. Thus also we send sound through the air and shake the drum of the distant ear, while each particular particle of the air concerned in the...illustrations prevents one from suspecting that, so far from seriously intending them as a pertinent inculcation of scientific truth, he was adroitly attempting... | |
 | Elroy McKendree Avery - 1878 - Страниц: 480
...swaying to and fro. Thus also we send sound through the air, and shake the drum of a distant ear, while each particular particle of the air concerned in the...transmission of the pulse makes only a small oscillation." 423. Sound Waves. — The layers of air are crowded more closely together by each outward vibration... | |
 | 1883 - Страниц: 402
...he says: " Thus, also, we si'inl sound through the air, and shake the drum of the distant ear, while each particular particle of the air concerned in the...transmission of the pulse makes only a small oscillation." Here, according to this renowned author, sound is a something sent out through the air by the sounding... | |
 | Elroy McKendree Avery - 1885 - Страниц: 616
...sound through the air, and shake the drum of a distant ear, while each particular particle of the ai r concerned in the transmission of the pulse makes only a small oscillation." (See First Prin., Exps. 141-144.) 485. Sound Waves. — The layers of air are crowded more closely... | |
 | Elroy McKendree Avery - 1895 - Страниц: 630
...swaying to and fro. Thus also we send sound through the air, and shake the drum of a distant ear, while each particular particle of the air concerned in the...transmission of the pulse makes only a small oscillation." The Medium of Sound. Experiment 102. — Place a small music box or alarm clock on a thick layer of... | |
 | Elroy McKendree Avery, Charles Peter Sinnott - 1897 - Страниц: 168
...swaying to and fro. Thus also we send sound through the air, and shake the drum of a distant ear, while each particular particle of the air concerned in the...transmission of the pulse makes only a small oscillation." The distance through which the individual particle swings is called the amplitude of vibration. In... | |
 | Don Glass - 1996 - Страниц: 222
...to and fro. "Thus, also, we send sound through the air, and shake the drum of a distant ear, while each particular particle of the air concerned in the...transmission of the pulse makes only a small oscillation." If you try John Tyndall's demonstration yourself, you'll see that each person in line can't help pushing... | |
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... would have broken the glass ; had he been close to a drum-head he would have shaken the drum. We could thus transmit a push through a row of a hundred boys, each particular boy, however, only swaying to and fro. Thus, also, we send sound through the... 