a device for measuring the quantity of electricity passing through a conductor by the amount of electrolytic decomposition it produces, or for measuring the strength of a current by the amount of such decomposition in a given time.
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Fig. 89 represents a standard resistance for making Clerk cell comparisons by the silver voltameter method.
Completing his circuit, he permitted the current to continue until 'a reasonable quantity of gas' was collected in the voltameter.
With the indications of his voltameter he compared the decompositions of other substances, both singly and in series.
He wished to ascertain what relation this decomposition bore to that of the water in his voltameter.
The resistance of the voltameter changes somewhat as the current passes.