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

Figure 5

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

Diagram of Bell's telephone, December 1877: image from Kingsbury, John E., The Telephone and Telephone Exchanges: Their Invention and Development (Longmans, Green, and Co., 1915), pg. 65