The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 321
bulb. Theyare subjected to numerous ma-nipulations to give them therequisite hardness,tenacity, elasticity,homogeneousness,and durabilit3^ The principal steps are the forming;carbonizing by baking at a high temperature with ex-clusion of air; and ■■ flashing, which consists in heatingthe carbonized… … FiG. 97. THE RELATIONS OF ELECTRICITY TO LIGHT. 305 bon of some filaments is entirely built up in this way ona base of fine platinum wire. There are also filamentsmade of hollow tubes for increase of surface. The average durability of a filament, in the 16 can-dle-power lamp, is from 600 to 1000…
Electricity · Magnetism
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