Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 575
ricity,although an absolutely necessary step, would not have been capable ofbringing about the present development of electric lighting, unless theappliances by which the current is made to manifest itself as liglu hadnot also been brought nearly to perfection. The conditions required tomaintain a… … Fig. 280^.— The Brush Dynamo. systems that have been invented since it became obvious that the light ofthe electric arc admitted of practical application on the large scale arevery numerous. The earlier forms of regulator, which were used only forscientific purposes—such as lantern projections on…
Inventions
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