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Telharmonium console by Thaddeus Cahill 1897. The Telharmonium (also known as the Dynamophone [1]) was an early electrical organ, developed by Thaddeus Cahill c. 1896 and patented in 1897. [2] [3] [4] The electrical signal from the Telharmonium was transmitted over wires; it was heard on the receiving end by means of "horn" speakers. [5]
Station location on a map. A.B. Dobrowolski Polar Station (Polish: Stacja im. A.B. Dobrowolskiego) is an occasionally active Polish polar research station in Antarctica.It is located at the edge of the Algae Lake, Bunger Hills region in the Wilkes Land and was originally constructed by the Soviet Union.
The South Pole Traverse, also called the South Pole Overland Traverse (SPoT), [2] or McMurdo–South Pole Highway [3] is an approximately 995-mile-long (1,601 km) flagged route over compacted snow and ice [4] in Antarctica that links McMurdo Station on the coast to the Amundsen–Scott South Pole Station, both operated by the National Science Foundation of the United States. [5]
Cahill had tremendous ambitions for his invention; he wanted telharmonium music to be broadcast into hotels, restaurants, theaters, and even houses via the telephone line. [3] At a starting weight of 7 tons (and up to 200 tons) and a price tag of $200,000 (approx. $5,514,000 today), only three telharmoniums were ever built, and Cahill's vision ...
Wilkes Station was named after Charles Wilkes, a 19th-century American explorer who discovered the phenomenon of the continental margin, which helped prove that Antarctica was a continent. [ 1 ] Wilkes was one of seven bases that the United States built for the IGY, which also included McMurdo, Hallett , Admundsen-Scott (South Pole Station ...
A typical 12 V, 40 Ah lead-acid car battery. An automotive battery, or car battery, is a rechargeable battery that is used to start a motor vehicle.. Its main purpose is to provide an electric current to the electric-powered starting motor, which in turn starts the chemically-powered internal combustion engine that actually propels the vehicle.
Antarctica: Livingston Island and Greenwich, Robert, Snow and Smith Islands. Scale 1:120000 topographic map. Troyan: Manfred Wörner Foundation, 2010. ISBN 978-954-92032-9-5 (First edition 2009. ISBN 978-954-92032-6-4) South Shetland Islands: Smith and Low Islands. Scale 1:150000 topographic map No. 13677. British Antarctic Survey, 2009.
"Primary" batteries can produce current as soon as assembled, but once the active elements are consumed, they cannot be electrically recharged. The development of the lead-acid battery and subsequent "secondary" or "chargeable" types allowed energy to be restored to the cell, extending the life of permanently assembled cells.