A laboratory course in experimental physics (1896)
Loudon, W. J. (William James), McLennan, John Cunningham, joint author · New York and London, Macmillan and Co. · leaf 138
d vibratingloudly. When the keys are all down and the stoppers closed,all that is heard is a gentle humming sound. HELMHOLTZS APPARATUS. 123 The object of the apparatus is to combine the fundamentalnote ut^ with any of the harmonics in the series, and observethe quality or timbre of the… … Fig. 23. introducing a great resistance into the circuit; or the interrupt-ing apparatus, which is quite independent of the other part of theinstrument, may be carried to another room, and the circuitthrough the forks completed by wires leading from one room tothe other. 124 EXPERIMENTAL PHYSICS.…
Physics
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