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Society: IEEE Main Category: Electric Sub Category: Era: 1870-1879 DateCreated: 1876 Boston State: MA Zip: 02203 Country: USA Website:,_1876 Creator: Bell, Alexander Graham

The first transmission of intelligible speech over electrical wires took place on 10 March 1876. Inventor Alexander Graham Bell called out to his assistant Thomas Watson, “Mr. Watson, come here! I want to see you.” This transmission took place in their attic laboratory located in a near here at 5 Exeter Place. A pioneer in the field of telecommunications, Alexander Graham Bell was born in 1847 in Edinburgh, Scotland. He moved to Ontario, and then to the United States, settling in Boston, before beginning his career as an inventor.

Image Credit: Courtesy IEEE Image Caption: The telephone used in the first intelligible transmission over electrical wires. Era_date_from: 1876
Montgomery Bell's Tunnel
Society: ASCE Main Category: Civil Sub Category: Tunnels Era: 1800-1829 DateCreated: 1818 Harpeth River State Park Kingston Springs State: TN Zip: 37082 Country: USA Website: Creator: Bell, Montgomery

Montogomery Bell was a land developer and iron maker who purchased the Harpeth Narrows site to expand his industrial empire - which ultimately consisted of 14 iron blast furnaces throughout middle Tennessee.

The Harpeth River makes a tight bend around a steep limestone ridge, losing 17 feet of elevation in a run of 5 1/2 miles. Bell excavated a tunnel through the limestone ridge, creating a shortcut for the river. The hydropower derived from this drop in elevation was used to drive the Patterson Iron Works built by Bell.

Image Credit: Public Domain (Author's Choice) Image Caption: Montgomery Bell's Tunnel Era_date_from: 1818
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