St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 50
Fig. 60. … Fig. 61. shows a few of the common forms used. (See Appa-ratus Book, Chapter V., for home-made binding-posts.) CHAPTER VI. UNITS AND APPAEATTJS POR ELECTRICAL MEASURE-MENTS. 64. Electrical Units. In order to measure eledlricityfor experimental or commercial purposes, standards orunits are just as…
Electricity
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