MRS. B.
You are right; I ought to have added that the two vessels must be connected together by some interposed substance capable of conducting electricity. A piece of moistened cotton-wick answers this purpose very well. You see that the cotton ([Plate XIII.] fig. 2. c.) has one end immersed in one glass and the other end in the other, so as to establish a communication between any fluids contained in them. We shall now put into each of the glasses a little glauber salt, or sulphat of soda, (which consists of an acid and an alkali,) and then we shall fill the glasses with water, which will dissolve the salt. Let us now connect the glasses by means of the wires (e, d,) with the two ends of the battery, thus . . . .
Vol. II. page 16.
Fig. 2. 3 & 4. Instances of Chemical decomposition by the Voltaic Battery.
[Larger view] (complete Plate)
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CAROLINE.
The wires are already giving out small bubbles; is this owing to the decomposition of the salt?
MRS. B.