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On the 22nd of July, his apparatus was already so far advanced, that it was fit to work. He wrote: “At last the telegraph is finished;” also: “The new little telegraphic machine works well.”

He, however, went on making still further improvements, and it was only on the 6th of August that he considered the telegraph quite completed. He was much pleased with its performance, being able to work through 724 feet of wire. He noted that day: “I tried the entirely finished apparatus, which completely answers my expectation. It works quick through wires having the length of twice 362 Prussian feet, so that the current passes along 724 feet.”

Two days later, he could already telegraph through one thousand, and, on the 18th August, through as much as two thousand feet of wire.

On the 29th of August he exhibited the telegraph in action before a meeting of the Academy of Sciences at Munich.

He now wished to send his telegraph to the National Institute at Paris, and for doing so an apparently favourable opportunity presented itself.

An old acquaintance and scientific correspondent of