. Kirkes' handbook of physiology . Fig. 314.—Diagram of a Daniells Cell .4, Dry Cell B. 444 M USCLE-NERVE PIIYSIOLOGY mersed in a porous cell containing dilute sulphuric acid; and this cell is again containedwithin a large copper vessel (forming the negative plate) containing a saturated solutionof copper sulphate. The electrical current is made continuous by the use of the twofluids in the following manner. The action of the dilute sulphuric acid upon the zinc platepartly dissolves it, and liberates hydrogen, and this gas passes through the porous vessel, anddecomposes the copper sulphate int
. Kirkes' handbook of physiology . Fig. 314.—Diagram of a Daniells Cell .4, Dry Cell B. 444 M USCLE-NERVE PIIYSIOLOGY mersed in a porous cell containing dilute sulphuric acid; and this cell is again containedwithin a large copper vessel (forming the negative plate) containing a saturated solutionof copper sulphate. The electrical current is made continuous by the use of the twofluids in the following manner. The action of the dilute sulphuric acid upon the zinc platepartly dissolves it, and liberates hydrogen, and this gas passes through the porous vessel, anddecomposes the copper sulphate into copper and sulphuric acid. The former is depositedupon the copper plate, and the latter passes through the porous vessel to renew the sulphuric. Fig. 315.—Du Bois Reymonds Key. acid which is being used up. The copper-sulphate solution is renewed by crystals of thesalt, which are kept on a little shelf attached to the copper plate and slightly below thelevel of the solution in the vessel. The current of electricity supplied by this cell willcontinue without variation for a considerable time. Other cells, such as the dry cell(which, however, is adapted to open-circuit work) may be used in place of Daniells. The
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