Ear model by Philipp Reis, 1930s
Front view of the ear model by Johann Philipp Reis (left). Reis wanted to use it to understand how the ear functions and thus gained knowledge that he used to build an early telephone prototype in 1861. On the right, a cord telephone. Photo from the 1930s
Picture No
13330365
Media ID
48318146
Size
4961px x 2972px
(873KB)
Credit
(c) Mary Evans / Sueddeutsche Zeitung Photo
Usage Restrictions
No model release, no property release. No commercial, merchandising or advertising use without release by SZ Photo
Source
SZ Photo - Scherl
Date
1930
