The elements of physiological physics The elements of physiological physics: an outline of the elementary facts, principles, and methods of physics; and their applications in physiology elementsofphysio00mgre Year: 1884 chap, xxxiii.] ANALYSIS OF SOUND, 447 led thither from an ordinary gas-pipe, and from this side of the chamber is a little burner similar to that already described (Fig. 193). Each resonator is con- nected in this way with its own gas chamber and burner, and the bur- ners are all placed in a row one above another, as shown in Fig. 194. Now if the air in any one resona- tor
The elements of physiological physics The elements of physiological physics: an outline of the elementary facts, principles, and methods of physics; and their applications in physiology elementsofphysio00mgre Year: 1884 chap, xxxiii.] ANALYSIS OF SOUND, 447 led thither from an ordinary gas-pipe, and from this side of the chamber is a little burner similar to that already described (Fig. 193). Each resonator is con- nected in this way with its own gas chamber and burner, and the bur- ners are all placed in a row one above another, as shown in Fig. 194. Now if the air in any one resona- tor be agitated, the indiarubber partiti o 11 of the chamber, separating gas on one side from air continu- ous with the resonator on the other, will be thrown into vibration, Fig of Sound by the gas and the flame Koenig's Apparatus. will both be agitated. The agitation of the flame will be perceptible to the naked eye by its becoming thinner and bluer. By a de- vice due to Wheatstone, this may be rendered more striking. Opposite the eight gas burners is a long mirror with four reflecting sides, at right angles to one another. This may be revolved on an almost perpendicular axis, by a toothed wheel arrangement. If the gas issuing from the burners be lighted, and the mirror revolved, the light reflected from the four surfaces of the mirror gives the impression of a continuous band. If the flame be agitated the revolutions of the mirror separate out each movement, and the band of flame is now segmented (Fig. 194, a b). There are, then, eight flames, one corresponding to each resonator; in the revolving mirror are seen eight bands of flame. If any one flame be agitated it is at once detected by the segmentation, as seen in the mirror; so that if
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