Alexander Graham Bell National Historic Site Alexander Graham Bell National Historic Site Alexander Graham Bell National Historic Site is a property in Baddeck, Cape Breton, Nova Scotia, Canada, overlooking the Bras d'Or Lakes. The site is a unit of the national park system, and includes the Alexander Graham Bell Museum, the only museum in the world containing the actual artifacts and documents from Bell's years of experimental work in Baddeck. This site was designated a National Historic Site in 1952. The museum features artifacts donated in 1955 from the Bell family's personal museum, located in the Kite House at Beinn Bhreagh. The museum also features memorabilia
Elisha Gray and Alexander Bell telephone controversy hooked up into the circuit. These experiments, with a vibrating wire touching a liquid, anticipated the liquid transmitter of Bell's telephone in March, 1876 three years later. (Compare Fig. 3 and Fig. 7, for example.) Initially, Bell was trying to develop a telegraph capable of sending multiple messages simultaneously over the same wire. Most of these early experiments involved "liquid transmitters" based on the Helmholtz model. On November 9, 1874, Bell's friend and neighbor, P.D. Richards, wrote the inventor a letter at Bell's request describing the experiments and transmission of telegraphic messages over wires using a liquid transmitter filled with