. The Philosophical magazine; a journal of theoretical, experimental and applied physics . three pairs. In the former the two zinc plates, Zi and Z2, areconnected with mercury-cups ISTos. 1 and 3 (No. 1 being alsoconnected with No. 5), whilst the two copper plates, Ciand C2,are connected with cups Nos. 2 and 4 respectively. CupsNos. 6 and 7 are connected with a standard cell (the error ofwhich, in reference to the average taken as 1457 volt, isknown). By means of a double switch any pair of the seriesof cups 1 to 7 can be connected with cups 8 and 9, whichare connected M-ith the electrometer t
. The Philosophical magazine; a journal of theoretical, experimental and applied physics . three pairs. In the former the two zinc plates, Zi and Z2, areconnected with mercury-cups ISTos. 1 and 3 (No. 1 being alsoconnected with No. 5), whilst the two copper plates, Ciand C2,are connected with cups Nos. 2 and 4 respectively. CupsNos. 6 and 7 are connected with a standard cell (the error ofwhich, in reference to the average taken as 1457 volt, isknown). By means of a double switch any pair of the seriesof cups 1 to 7 can be connected with cups 8 and 9, whichare connected M-ith the electrometer through the usual rever-sing-gear; so that when Nos. 1 and 2, 2 and 3, 3 and 4, and4 and 5 are thus connected, the electromotive forces due tothe combinations z^c^, C1Z2, z^^ c^Zx are respectively read off;whilst when 6 and 7 are connected (as represented in thefigure) the electrometer-scale is standardized. In actuallytaking readings a double set was always employed, the SAvitchbeing successively used to connect the four combinations andthe standard with the electrometer, and then
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