Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 175
plied by the absolutemeasure of gravity to reduce it to absolute units of force. Thismay be assumed 98J. 156 Electricity. [Book II. potential becomes known in absolute measure by the formula 8irP~ K/¥ v ~s In the drawing we have omitted the external case, themechanical arrangement of the micrometer… … Fig. 102. electrometer is not sensitive enough. In these casesheterostatic instruments have to be employed. Fig. 102 chap, v.] Absolute Measure of Electricity. 157 represents the Portable Electrometer, constructed speciallyfor observations on atmospheric electricity. The attracteddisc (A) consists…
Electricity
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