Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 127
ks of Italian marble; when lighted,they apjiear equally and mildly luminousall over, gi^•i^g a most charming effect,and yet ))eing a most efficient form ofsemi-indii-ect lighting. 114 THE ILLUMINATING ENGINEER. B.T.H. Theatre Dimmers. The figure shows one of the B.T.H.nietalhc theatre dimmers.… … The B.T.H. dimmer can be oi)eratedvery easily, even by a novice. They arebuilt up in standard plates, somewhatlike an adjustable bookcase, and can bemade in two distinct types—to mounteither fiat against, or at riglit angles to,the switchboard. Fuller information can be obtainedfrom the British…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
