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 82
ter beingopened at the proper moment. Sometimes the flame was blown outby a too violent explosion, so this method gave way to a porcelain tubethat was kept at white heat by an interior flame. Tube being subjectto breakage, spongy platinum, heated by compression, was next triedand found to work, if…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
