Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 484
district that oilfrom shale could only be successfullyadded to commercial petroleum atcertain periods of theyear —for example,when the mistral was blowing ; butthat it would be injudicious to addlarge quantities when the wind wasfrom the sea! These two periodscorrespond respectively to…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
