. Bulletin. B. HOLDER USED IN TIP-BREAKING TESTS. C. HOLDER USED IN PUNCTURE TESTS. DETAILS OF THE INVESTIGATION. 15 degree that almost all of the energy absorbed by the lamp was con-centrated in those sections. The temperature of those sections roseto a degree which, judged by the eye, equalled or exceeded the nor-mal temperature of the filament in a vacuum. In the majority oftests of standard lamps the filaments burned off after the gas hadignited. EXCEPTIONAL TEST RESULTS. The results of the investigation as a whole were satisfactorily con-sistent. Quite as satisfactory, however, were a few
. Bulletin. B. HOLDER USED IN TIP-BREAKING TESTS. C. HOLDER USED IN PUNCTURE TESTS. DETAILS OF THE INVESTIGATION. 15 degree that almost all of the energy absorbed by the lamp was con-centrated in those sections. The temperature of those sections roseto a degree which, judged by the eye, equalled or exceeded the nor-mal temperature of the filament in a vacuum. In the majority oftests of standard lamps the filaments burned off after the gas hadignited. EXCEPTIONAL TEST RESULTS. The results of the investigation as a whole were satisfactorily con-sistent. Quite as satisfactory, however, were a few tests whoseresults were the exact opposite of what was to be expected. Someof the exceptional results are mentioned below and are of interestas showing a few of the possible variations in the behavior of thelamps. Lamp 161, rated 190 watts at 220 volts, and lamps 146 and 171,rated 120 watts at 55 volts, were smashed under series 1 were the only standard lamps whose filaments were not brokenwhen the bulbs were smashed. Each lamp
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