Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 182
Fig. 107. two inductors (AB) in the form of half-cylinders separatedby a small air space, and two insulated metal carriers (CD) 164 Electricity. [Book II. attached to an ebonite spindle, by which they can be rapidlyrotated between the inductors.
Electricity
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