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Heidelberg instrument, which he calls: Professor Möncke's. On plate II., belonging tb Tome IX. of Gehler's before-mentioned Dictionary of Natural Philosophy, Professor Muncke, as I have already mentioned, has represented Baron Schilling's telegraph in Figs. 9,10 and 11. On comparing the figures in both these publications, it will be seen that they represent the same instrument, and this in-contestably proves that Mr. Cooke's Heidelberg (Möncke's) telegraph was no other than Baron Schilling's.
On the 12th June a caveat for a patent was lodged, and it was determined to institute experiments with the projected telegraphic apparatus on a line of some extent.
Accordingly, on the 25th July, a trial was made at the terminus of the London and Birmingham Railway, then constructing, along wires one mile and a quarter in length, from Euston-square to Camden Town. This was the first instance of out of door telegraphing in England with a galtanic apparatus. It took place thirteen days before the decease of Baron Schilling, who died at St. Petersburg, on the 7th of August, without getting informed of the introduction of his telegraph into England.
In order to be able to try whether the instruments would work through considerable distances, Mr. Cooke had been
