Go back to article: Troublesome telephony: how users and non-users shaped the development of early British exchange telephony

Figure 6

Black and white pen and ink drawing of a cross section of Edison's transmitter from the late 1800s

Diagram of Edison's transmitter: image from Prescott, George Bartlett, Bell's Electric Speaking Telephone: its Invention, Construction, Application, Modification and History (D. Appleton & Company, 1884 (reprinted Arno Press, 1972)), pg. 36