. A treatise on electrolysis and its applications to therapeutical and surgical treatment in disease . precedingchapter. The quantity of a current may be measured in various ways; themethod of these should he dependent upon instrumental measurements,which are based upon the unit of measurement and are a matter ofuniform agreement; that is, an initial electromotive force which mayoriginate in a galvanic cell may pass through indefinite number of unitsof resistance in the external circuit; these latter may be calculated by acomparison of the same original current strength which may he made topas
. A treatise on electrolysis and its applications to therapeutical and surgical treatment in disease . precedingchapter. The quantity of a current may be measured in various ways; themethod of these should he dependent upon instrumental measurements,which are based upon the unit of measurement and are a matter ofuniform agreement; that is, an initial electromotive force which mayoriginate in a galvanic cell may pass through indefinite number of unitsof resistance in the external circuit; these latter may be calculated by acomparison of the same original current strength which may he made topass a known number of units of resistance. The amount of work ac-complished by the current in a unit of time may be measured by theamount of chemical decomposition of a known chemical compound,through which the same strength of current may be made to net alwaysthrough the same units of resistance. It is known that a coulomb willdecompose from a one per cent, solution of sulphuric acid in distilled 260 ELECTROLYSIS. water a mixed volume of hydrogen and oxygen, which is equal to .176cubic
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