Arrangement of Battery, Resistance, and Galvanometer

“Represents in diagram the arrangement of the battery, resistance, and galvanometer. There are two keys, K and K, , placed in the circuit whose uses will be subsequently explained for the present, the diagram will be considered as if these keys did not exist, and as if the current flowed permanently through. the circuits as is indicated by the arrow-heads.” (Britannica, 1891)

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