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1942 - lightning arresters are assembled with other parts inside a wet-process porcelain shell

SPECIFICATIONS...
ACCURACY...
ASSEMBLY...
LIGHTNING

CD 1966034 E&MP28.002

Electric Lightning

October 1942

Pre-tested units for lightning arresters are assembled with other parts inside a wet-process porcelain shell, according to exact blueprints and specifications at Westinghouse 







Original Caption by Science Service
Westinghouse



National Museum of American History

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