Spon, Ernest, Haldane, Robert, Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 · London ; New York : E. & F.N. Spon · leaf 172
Construction. — Instructions will now each other. The resistance of the points be given for the construction of micro- was balanced in the bridge in the usual phones of various forms and patterns. way. Pressure was then applied by a (I) Simple Microphone, capable of known number of turns or parts… … action. What he has termed the air copper and zinc, about 3 in. square, with and the tremor effects take place si- a piece of blotting - paper between, multaneously. The tremor effect pro- damped with vinegar. It answers duces a jolting of the carbons sufficient equally as well as an expensive…
Workshop recipes · Technology · Industrial arts
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
