Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 568
nd which I consider a necessity to insureperfect confidence in the regular exhibition of the electric light, this light■ can be doubled in intensity during such evenings as the atmosphere isfound to be so thick as to impair its efficiency. This double power wouldbe obtained at the trifling… … Fig. 272,.—Gramme Machine, with Eight Vertical Electro-magnets.for the electric light, I consider this powerful illuminant, if manipulated by ELECTRICITY. 5x7 carefvil attendants, perfectly reliable : in proof of this I may state that theelectric li-^ht at the Souter Point Lighthouse, on the coast…
Inventions
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