. Elements of chemistry ... le metal, the oxygen combines with the metal insteadof being extricated and rising up the tube. When neutral salts, whether alkaline, metallic, or earthy,such as common salt, blue vitriol, or alum, are exposed tothe action of a powerful battery, the same law is observed;the acid, which contains the oxygen, goes to the positivewire, while the bases, being alkalies, metals, or earths, aretransferred with the hydrogen (for these salts always con-tain water) to the negative wire. 156. But the most surprising effects of the power of thisprinciple is exhibited when the co
. Elements of chemistry ... le metal, the oxygen combines with the metal insteadof being extricated and rising up the tube. When neutral salts, whether alkaline, metallic, or earthy,such as common salt, blue vitriol, or alum, are exposed tothe action of a powerful battery, the same law is observed;the acid, which contains the oxygen, goes to the positivewire, while the bases, being alkalies, metals, or earths, aretransferred with the hydrogen (for these salts always con-tain water) to the negative wire. 156. But the most surprising effects of the power of thisprinciple is exhibited when the compound is placed in cupsconnected with the two sides of the battery, and the two Describe the method of decomposing water by galvanism, and of retainingthe two gases in a separate state. In performing this experiment, why is thetube on the negative side first filled with gas* In decomposing the saltswhat law is observed in respect to the poles at which their elements areextricated. CHEMICAL EFFECTS OF GALVANISM. 73 Fig. constituents of the compound are transferred from one cup tothe other. If the solution of any saline compound, such as Glauberssalt, be made in water, and placed in two cups, one con-nected with the positive, and the other with the negative sideof the battery, then, by making a communication betweenthe cups, by means of some moistened asbestos, or cotton,and setting the battery in action, the two constituents of thesalt will be transferred from one cup to the other. 157. Fig. 30 will show the sit-uation of the cups, the asbestos,and the galvanic poles of thisexperiment. Both cups con-tain a solution of Glauberssalt. This salt is composedof sulphuric acid, soda, andwater. The cup P is connec-ted to the positive side of the battery, by a wire, passing into the fluid, and the cup N,with the negative side, in the same manner. The cups areconnected by the moistened asbestos passing from the fluidof one to that of the other. When this arrangement iscompleted, and
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