ghboring portions of the coil It has been found that to get the best In this way no trouble will be experi- forming the inductance. With the con- results from galena it is necessary to enced from knobs falling off. To adjust denser removed the coil itself has a use a light contact—the material of… … signals or also by means of the buzzer importance than the lightness of the test. A perspective view of the finished contact. For this purpose a short piecé as seen at Fig. 2c, where a brass piece of 36 or 38 guage copper or phosphor detector is given at Fig. 1, while a plan M, is bored out, and a…
Radio · Periodicals · Electrical Experimenter
Internet Archive · Curtis Philips · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-155-101.webp)
