Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute (1910)
Pendry, H. W. (Henry Walter) · London ; New York : Whittaker & Co. · leaf 155
length yet laid in one piece occurs in onepart of this cable, the section from Fanning Island toVancouA-er, Avhich are distant about 4000 nautical miles. Testing Instruments employed, and Methods of using THEM IN THE 8IMPLER TeSTS. The W]icatsto)ie Bridge, one ol the most xiseful of… … Fig. 122.—Conveutional arrangement of Wheatstoue Bridge balance. values the fourth can be calculated. This is convenientlyexplained by means of a parallelogram, although in prac-tice it never bears this form. Consider Fig. 122. The twocircuits HaFxQ and llhGDQ have the same differenceof potential…
Telegraph
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