Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 74
Fig. 73. W4420. … Fig. 74. W4425. 70 SELF-INDUCTION APPARATUS. W4420. I^ecohmineter Grade B |50 00 An improved form of the well-known instrument of Profs. Ayrton andPerry. The Secohmmeter will: 1. Compare two co-efficients of self induc-tion ; 2. Compare two capacities; 3. Compare two co-efficients of…
Electric apparatus and appliances · Equipment and supplies
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