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Bulletin. A. LAMPS IN TIP-BREAKING TEST, SHOWING FILAMENTS DISTORTED AND BROKEN BY THE ENTERING GAS.. B. LAMPS IN TIP-BREAKING TEST, SHOWING FILAMENTS THAT BURNED OFF AFTER IGNITING THE GAS. DETAILS OF
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Comparative tests of carbon, metallized carbon and tantalum filament lamps . lthough great care was taken throughout the tests not tosubject the lamps to shocks or jars. Candle Power Maintenance and Change
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