Читать книгу Philipp Reis: Inventor of the Telephone - Silvanus P. Thompson - Страница 7

The second form, a tube constructed by Reis himself, of tin, is still to be seen in the Physical cabinet of Garnier’s Institute, at Friedrichsdorf, and is shown in Fig. 7. It consists of an auditory tube a, with an embouchure representing the pinna or flap of the ear. This second apparatus shows also a great similarity with the arrangement of the ear, having the pinna or ear-flap, the auditory passage, and the drum-skin (a, b, c). Upon the bladder c there still remains some sealing-wax, by means of which a little strip of platinum, for the all-essential loose-contact that controlled the current, had formerly been cemented to the apparatus.

Fig. 7.