Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 157
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… … Vibrating Flame Apparatus.Fig. 140.
Physics · Lantern projection · Electric apparatus and appliances
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