THE FIRST TELEPHONE. 
47 
Avhich the tone or combination of tones would have produced 
upon us. Taking my stand upon the preceding principles, I 
have succeeded in constructing an apparatus,” &c. He con- 
cludes his paper by saying that the newly-invented Phonautograph 
of Duhamel may perhaps afford evidence as to the correctness of 
the views which he has asserted respecting the correspondence 
between sounds and their curves. 
The actual apparatus figured in this memoir, and exhibited 
to the Frankfort Society in October, 1861, is now in my 
possession ; and 1 have also temporarily entrusted to me a still 
earlier experimental telephone, made by Philipp Heis, in the 
form of a model of the human earp This interesting instrument 
is depicted in its actual condition and size in Figures, 1/2, and 3, 
and in section in Fig 4. 
Fig. 1. Fig. 2. 
I The property of Leon Gamier, Esq., Director of Garnier’s 
Institute at Friedrichsdorf, near Homburg, where Philipp Eeis was 
formerly teacher of Natural Sciences. 
