Electrical treatment

Electrical treatment

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Recently tantalum, focus tubes have been made by Messrs. Siemens, having a coating of tantalum instead of platinum on the anti-kathode. This is the same metal that is used for the wire filament in the tantalum incandescent lamps, and owinganbsp;...

Title:Electrical treatment
Author:Wilfred Harris
Publisher: - 1908


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