Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 245
which thecoils have been turned from the magnetic meridian. In thiscase the current strength is proportional to the sine of theangle of deflection, and for use with this form of galvanometera table of sines is given in Appendix II. The sine galvanometer can be made without any loss ofaccuracy in a… … Fig. 142. meter or Sir W. Thomsons mirror galvanometer may be used.The astatic galvanometer is named from the employmentof an astatic needle. This consists of two exactly equal Chap. III.] Ohms Law. 22 magnetic needles attached to a common axis, with their polesin opposite directions. Such a system…
Electricity
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