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We begin skirmishing with a few light ideas, testing for thoughts, as our electro-chemical friend, De Sauty, if there were such a person, would test for his current; trying a little litmus-paper for acids, and then a slip of turmeric-paper for alkalies, as chemists do with unknown compounds; flinging the lead, and looking at the shells and sands it brings up to find out whether we are like to keep in shallow water, or shall have to drop the deep-sea line; in short, seeing what we have to deal with.

Flint very graciously signified his willingness thus to condescend; and without delay, accompanied by the still incredulous Waldron, and followed by Herzog, he passed out of the administration building, through a covered passage and into the electro-chemical works.

Causticity and fluidity have long since been excluded from the characteristics of the class, by the inclusion of silica and many other substances in it; and the formation of neutral bodies by combination with alkalis, together with such electro-chemical peculiarities as this is supposed to imply, are now the only differentiæ which form the fixed connotation of the word Acid, as a term of chemical science.

A crowd of facts of this character forced upon Faraday's mind the conclusion that the amount of electro-chemical decomposition depends, not upon the size of the electrodes, not upon the intensity of the current, not upon the strength of the solution, but solely upon the quantity of electricity which passes through the cell.

Galvanism reacting on chemistry disclosed the metallic bases of the alkalies, and inaugurated the electro-chemical theory; in the hands of Oersted and Ampère it led to the laws of magnetic action; and by its aid Faraday has detected significant facts relative to the constitution of light.

We begin skirmishing with a few light ideas, testing for thoughts, as our electro-chemical friend, De Sauty, if there were such a person, would test for his current; trying a little litmus-paper for acids, and then a slip of turmeric-paper for alkalies, as chemists do with unknown compounds; flinging the lead, and looking at the shells and sands it brings up to find out whether we are like to keep in shallow water, or shall have to drop the deep-sea line; in short, seeing what we have to deal with.

The low rates at which electric power can be sold in the immediate neighborhood of the Niagara generating plant have naturally resulted in an enormous growth of the electro-chemical industries, for these industries could never otherwise develop into extended commercial applications.

But from all these difficulties emerged the golden truth, that under every variety of circumstances the decompositions of the voltaic current are as definite in their character as those chemical combinations which gave birth to the atomic theory. This law of Electro-chemical Decomposition ranks, in point of importance, with that of Definite Combining Proportions in chemistry.

To all intents and purposes the deposits obtained from acid solutions under favourable circumstances are fairly adhesive when great care has been exercised to thoroughly scale and clean the surface to be coated, which is found to be the principal difficulty in the application of any electro-chemical process for copper, lead, or tin, as well as for zinc, and that renders even the application of paint or other brush compounds to futile unless honestly complied with.

One of the earliest notable uses of the electric furnace in a large electro-chemical industry was for the production of carborundum, a carbide of silicon, which is remarkably useful as an abrasive, being available in the manufacture of grinding stones and other like purposes to replace emery and corundum.