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- · New York, T. Audel · leaf 186
number of spokes; otherwise, the rim will appear to travel slower than the spokes. 874 HAWKINS ELECTRICITY sign with letters above and below. In this case, it is best toalternate the stroke with the letters, that is, flash the wordingon and then off. As soon as it goes out, the stroke flies… … IiG. 1 .CBS—^Dolls Hg***g tirpe Sasber for giving the ai>pearance of a streak of lightninggoing across a display. from any point above. The flash goes down and when it hits thesign the latter lights up, holds a few seconds, goes out, andrepeats about four times a minute. Lightning flashes are…
Electrical engineering
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