A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 254
ther the trolley wires at any point wherethe trolley wire branches, and properly guidingthe trolley wheel along the trolley wire on themovement of the car over the track. Frog, Trolley, Kight-Hand A trol-ley frog used at the point where the branchtrolley wire leaves the main line on the rightof the… … Fig. 2 bo, GalvanoscopicFrog. ley frog used where the line branches in threedirections.Frying of Arc—(See Arc, Frying of)Fulgurite.—A tube of vitrified sand, be-lieved to be formed by a bolt of lightning. The fulgurite consists of an irregular shapedtube of glass formed of sand which has beenmelted…
Electricity · Electrical engineering
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