Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 317
be broken. against the core of the magnet so that the drop is released and allowedto fall against the contact point connected with the A binding post. The drop, which is connected with C binding post, thereby closesthe bell circuit and allows the bell to ring until the drop is again raisedto its…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Catalog] (1902)](https://img.insideoutlibrary.com/img/200/ia-catalog00geob-21-61.webp)
