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no date - observing the causes of failure, quality of product may be maintained

OBSERVING CAUSE, PRODUCT QUALITY MAINTAINED

CD 1963102 E&MP 25.042

Electric Lamps

no date

Life test rack on which Westinghouse Mazda incandescent lamps are burned over-voltage until they fail.

By observing the causes of failure, quality of product may be maintained.


Original Caption by Science Service



National Museum of American History

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