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 330
-converted into asolid state by condensation, the phenomena at the arc are more or lessreversible and point to the existence of a constant drop at the arc. The resistance of an arc, as in the case of any other conductor, in-creases with its actual length and decreases with its cross section.… … Fig. 3,334.—The electric arc. View of the two carbon electrodes showing the pointed end ofthe negative electrode and the hollow formation or crater on the end of the positiveelectrode. The Electrodes or Carbons.—When an arc is establishedbetween two carbon rods placed vertically one above the…
Electrical engineering
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