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Updated: May 8, 2025
Three other things he did during the same period: he wrote his famous treatise, Human Morals, his remarkable brochure, The Criminal Sane, and he worked out his awful and monstrous scheme of revenge. It was an episode that had occurred in his electroplating establishment that suggested to him his unique weapon of revenge.
Ten years later he may explain that he's a chemical engineer specializing in the construction of corrosion-resistant structures, such as electroplating baths and pickling tanks for stainless steel. Year by year, his knowledge has become more specialized, and much deeper.
For some years it was not found feasible to operate motors on alternating-current circuits, and that reason was often urged against it seriously. It could not be used for electroplating or deposition, nor could it charge storage batteries, all of which are easily within the ability of the direct current.
Not only was it now possible to convert mechanical energy into electricity cheaply and in illimitable quantities, but electricity at once showed its ubiquitous availability as a motive power. Boats were propelled by it, cars were hauled, and even papers printed. Electroplating became an art, and telegraphy sprang into active being on both sides of the Atlantic.
Dynamo-electric machines of a primitive kind had been invented and were in use to a very limited extent for arc lighting and electroplating for some years prior to the summer of 1819, when Edison, with an embryonic lighting SYSTEM in mind, cast about for a type of machine technically and commercially suitable for the successful carrying out of his plans. He found absolutely none.
It had closed around a lump of greenish stone. "Malachite," Nance breathed. "One kind of copper ore. They reduced it, extracted some of the pure metal. See all the little reddish specks shining? It is pretty well established that the process is something like electroplating. There's a dissolving acid then a weak electric current from a kind of battery... Oh, nobody should laugh, Frank Dr.
For making duplicates it was obviously necessary to first secure a mold carrying the record in negative or reversed form. From this could be molded, or cast, positive copies which would be identical with the original. While the art of electroplating would naturally suggest itself as the means of making such a mold, an apparently insurmountable obstacle appeared on the very threshold.
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