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 81
ssaryto renew them about every sixty days. The reason dry cells deteriorateis because the moisture evaporates. Freezing, exposure to heat, andvibration which loosens the sealing, causes the evaporation. 5. Weak cells can be strengthened somewhat by removing the paperjacket, punching the metal cup…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
