Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 260
bert and a goodaccount of Bouguers experiments and ofthe elementary part of his theory. Hestated: That Lamberts law is notgenerally true was already shown byBouguers observations. * La Lumiere Electrique, XXXV., p. 615. t Wied. Ann., Vol. XLVII.. p. 638, 1892.Trans, the Electrician. Vol. XXX1TI..… … Fig. 5.—Blondel, depolished opal glass. apparently coincident edges, so that theirimages coalesced. But, unlike Bouguer.he used two candles. The two sourcesof light were screened in such a mannerthat each of them only illuminated oneof the plates. This quite accounts forthe want of precision of…
Lighting
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