Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 94
e iris diaphragmautomatically keeps the necessary draughl of the eve at about 1 foot-candle. Mr. Waldram also described s long and Btringenl -cue- of tests recently carried ou1 by Prof. Clinton and himself ■ I fniversity College to ascertain whether observations of the lighi at lv ; THE… … <<<<<<<<Oq_CLCLClG_Q-CLQ. 5j- in «o rs oo o> o — ^WfO^ifiONto Fia. 8. in a large laboratory comprising sevenwindows of different character, aspectand direction, corresponded with simul-taneous observations at similar positionsin a scale model of the laboratory and…
Lighting
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