Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 70
Fig. 2.—Aero-arc projector outfit, with small dynamo and automatic field-regulatiniiresistance. 2.000 candle-power. Weight only 60 lbs. iMr. A. LvoiO … Fir,. 3.—Stevens-Lyon patent signalling lamp. (.1/;-. A. Lyoii.\ beam of high efficiency. This lamp hasbeen successfully used for aircraftsignalling. Mr. Thomas E. Ritchie welcomed adiscussion upon this subject, becausewe had not yet approached anything would handle that dimension correctly,i.e.,…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
