Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 156
tion relative to the burner. By screwing the cap of the burner up or down, an adjust- SOUND. 133 ment may be secured which will cause the flame to repro-duce any sounds uttered in the mouthpiece attached to theflexible speaking-tube. With a fine adjustment articulatespeech or any note of the… … The Speaking Flame. portion of the flame being more sensitive to disturbinginfluences than any other. This fact has been determinedby experiments on sensitive flames, such as are describedfurther on. Bv speaking in the mouthpiece while the gasis cut off from the burner, it is found that no sound…
Physics · Lantern projection · Electric apparatus and appliances
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