Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 581
that, by its dilatation with a certain temperature,caused a contact to be made which diverted part of the currentthrough a shorter circuit, and thus lowered the temperature of the spiralto within the assigned limits. But the advantages presented by carbonover metallic conductors led Edison to… … Fig. 280//, the same direction, and, in the latter part of the year 1880, he cxliibitedthe first incandescent lamps shown in England. Swans carbon filamentswere prepared from cotton threads which had previously been steeped indilute sulphuric acid, washed, and passed through draw holes to give…
Inventions
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