Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 202
o the opera-tor. In fact, one is quite unconsciousof the variation, except by instrumentalaid. This interesting phenomenon raisesthe question of how far the foot-candlevalue of illumination can be taken asa criterion of the visual value. It is, of course, quite weW knownthat the visual value of the… … Fig 3.—lllumiuation of Composing Frames—Solicitors Law Stationery Society.
Lighting
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