Cowper's writing telegraph 1879. 1: complete apparatus. 2: the pen on the transmitter. 3: the pen on the receiver. 4: plan of the receiver.
Cowper's writing telegraph 1879. 1: complete apparatus. 2: the pen on the transmitter. 3: the pen on the receiver. 4: plan of the receiver.
Size: 12149px × 5178px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1879., apparatus, archival, archive, cowper, cowpers, diagramtelegraphycommunication, historical, history, pen, receiverplan, receivertelegraph, telegraph, telegraph1879complete, transmitter, writing
