Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 97
Sketch of ^Ir. C. J. Tirxers SELEXirii aprarvtus for coxtroleixc; the lighting sv.stem. The selenium cell, S, is inserted in circuit with two electromagnets, A, Al. The lignting circuitcontains the mercury cups, D. Dl, which are connectetl by the forked contact piece, V, attachedto lever-bar…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
