...among them, and the inclosed air also becomes cool. Under these circumstances a partial vacuum should be formed among the particles, and the outside air...led him to question whether, in our experiments with * "Philosophical Magazine," April, 1881, TO!, xi, p. 286. thin diaphragms, the sound heard was due...

...among them, and the inclosed air also becomes cool. Under these circumstances a partial vacuum should be formed among the particles, and the outside air...to the diaphragm or solid bed upon which it rests. In his paper read before the Royal Society on March ю Mr. Preece describes experiments from which...

...rarefaction is originated when the light is cut off. We can thus understand horo it is that a substance lite lamp-black produces intense sonorous vibrations in...diaphragms, the sound heard was due to the vibration of the disc or (as Prof. Hughes had suggested) to the expansion and contraction of the air in contact with...

...this a wave of condensation is started in the atmosphere each time a beam of sunlight falls upon the lampblack, and a wave of rarefaction is originated...very feeble vibration to the diaphragm or solid bed on which it rests." Of course the pitch of the sound emitted in any case depends upon the rapidity...

...like lamp-black produces intense sonorous vibrations in the surrounding air, while at the same lime it communicates a very feeble vibration to the diaphragm or solid bed upon which it rests. » Phil. Mag., April, 1881, vol. xi, p. 286. This curious fact was independently observed in England...

...like lamp-black produces intense «pnorous vibrations in the surrounding air, while at the same lime it communicates a very feeble vibration to the diaphragm or solid bed up 511 which it rests. In his paper read before the Royal Society on March 10 Mr. Freece describes...

...can thus understand how it is that a substance like lampblack produces intense sonorous vibriations in the surrounding air, while at the same time it...to the diaphragm or solid bed upon which it rests. In the series of experiments not a single solid substance was discovered which failed to become sonorous...

...lampblack, and a wave of rarefaction is originated when the light is cut oft". We can thus, under stand how it is that a substance like lampblack produces...air, while at the same time it communicates a very ftebfe vibration to the diaphragm or solid bed upon which it rests." 375. Propagation of Sound. —...

...among them, and the inclosed air also becomes cool. Under these circumstances a partial vacuum should be formed among the particles, and the outside air...very feeble vibration to the diaphragm or solid bed up jn which it rests. In his paper read before the Royal Society on March 10 Mr. Preece describes experiments...

...this a wave of condensation is started in the atmosphere each time a beam of sunlight falls upon the lampblack, and a wave of rarefaction is originated...feeble vibration to the diaphragm or solid bed upon ichich it rests. This curious fact was independently observed in England by Mr. Preece ; and it led...