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 193
which will sound like music in a receptive deviceand can be heard over a greater distance than a low frequencywave because the human ear is more susceptible to high notes. The Poulsen Wireless Company have developed a non-interferencesystem by transmitting oscillations of so high a frequency that… … VARIABLECONDENSER REttlO Q->CORD P05T5
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-225-132.webp)
