Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 25
lvedno errors in principle, either of con-.struction or use. With this accuracy requirement fixed,the smaller model of photometer incor-porates the essential features of thelarger model, through which acci-dental errors are minimized and syste-matic errors excluded. Description of Small Model.The… … Fig. 1.—Showing relative dimensions of original model and new smaller model.
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
