The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 383
ne.A microphone is placed close to the diaphragm of a telephone.The slight sound waves emitted by the telephone affect the micro-phone and are repeated in its circuit. The microphone circuitincludes a local battery and telephone. Microtasimeter. An apparatus for indicating minute changesin… … Fig. 243. MiCROTASIMETER. length either by heat or by moisture, is held pressing against thebutton. A slight change in length of the strip varies the resistance STANDARD ELECTRICAL DICTIONARY. 379 of the button and hence affects the galvanometer. In this wayexceedingly slight changes in heat or…
Electricity
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-412-186.webp)
