the waves .are exactly opposed to one another, the resultant is zero, and this is represented on the screen by the wire when its curves are in the same plane as the eye of the observer. The other four diagrams show a gradual increase in the resultant, until in No. 5 it is almost a maximum. Nos. 6… … lever which automatically. operates a circuit-closer and height. To the bottom is fixed a basket-like receptacle, DIAGRAMS OF SOUND WAVES. actuates the gate-valve in the manner described. C, containing the carbide. The cylinder, Q, open at A second branch-circuit is connected with a circuit- the…
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