vi
statement; for they contain drawings of Muncke’s model and of his own first telegraph. To these drawings Dr. Hamel, who had recently found Muncke’s original models at Heidelberg, refers at page 54 as correct.[1] Moreover, Mr. Hoppner (a gentleman named by Dr. Hamel at page 45) bore evidence to the accuracy of the drawings before Sir I. Brunel and Professor Daniell, in an arbitration Cooke v. Wheatstone, in 1841; the papers relating to which are contained in Cooke’s 2nd volume.
At pages 40 and 41, Dr. Hamel describes Baron Schilling’s telegraph in these words:—“He now used for it the deflection of the needle, which he placed within the multiplier of Scweigger, horizontally, on a light vertical axle hanging on a silken thread, and bearing a circular disc of paper coloured differently on each side. To make the needle move steadily, and to prevent oscillations Schilling had fixed to the lower extremity of its axle a thin platina plate, and immersed it in a cup of mercury.”
This description is in exact agreement with that given by Mr. Cooke (vol. 2, pp. 14 and 15) as follows:—
“Professor Muncke’s experiment was at that time the
only one upon the subject that I had seen or heard of.
- ↑ Plate 1, parts A and B, Cooke’s second volume at the end.
