The Philosophical magazine; a journal of theoretical, experimental and applied physics . be very much more conve-nient than the former, from the facility of detaching eithertube so as to discharge some of the gas, if it be desirable toalter the level of the water-mark ; or to examine or change thegas in any of the tubes. On the other hand, it has the disad-vantage of requiring the finger to be immersed in the electro-lyte, which, when the latter is of an active chemical character,is unpleasant and in some cases injurious. In fig. 6, a batteryof five cells of this construction is represented as
The Philosophical magazine; a journal of theoretical, experimental and applied physics . be very much more conve-nient than the former, from the facility of detaching eithertube so as to discharge some of the gas, if it be desirable toalter the level of the water-mark ; or to examine or change thegas in any of the tubes. On the other hand, it has the disad-vantage of requiring the finger to be immersed in the electro-lyte, which, when the latter is of an active chemical character,is unpleasant and in some cases injurious. In fig. 6, a batteryof five cells of this construction is represented as when chargedwith oxygen and hydrogen, and having been for some timeconnected with the voltameter (fig. 7), the tubes of which areof the same size as those of the battery. In the form last described (figs. 4 and 6), the tubes were allas nearly of the same size as could be procured; they eon- n ^ iiff 272 Mr. Grove on the Gas Voltaic Battery. tained each about 1^ cubic incii; in the first form (figs. 1 andS), the portion o, r oT the narrow tube contained 1^ cubic inch,FicT. 6. Fig. Fig. 9. and the portion h, r of the wide tube contained 2| cubic portion of the apparatus with which I wrought was con-structed by my order for the London Institution, and anotherportion belonged to Mr. Gassiot, and was by him very kindlyplaced at my disposal for the purpose of these experiments;had it not been for this valuable addition, I should have beenobliged to make all my experiments on a much smaller scale;thev would have taken more time and been by no means sosatisfactory. As I have already stated, a thirdform has occurred to me while writingthis paper, which I think in many re-spects more advantageous than eitherof the two preceding, and which, asit may be some time before I can ex-periment with it myself, I will heredescribe for the benefit of those whoare differendy situated. One cell ofit is shown in fig. 8: «, a, is a Woulfesbottle with three necks ; in the centreneck is fi
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