Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 267
cted that varia-tions of light might be followed andmeasured at any instant, thus enablinga number of observations to be madeab regular intervals. The qualitative part of the problem .54 nil-; ii.limin \ri\«. BNGINEEB {vov. L918) was more difficult, and comprised esti-mates and attempts at… … Kig. 1.—View of Original Tube Photometer. t«-iisit,\ or to lights of less brillianceand longer duration, and to the effeclof smoke and of different colouredflames. This part of the problem in-cluded the consideration of glare anddazzle which may be an advantage or Hickman were in progress, with…
Lighting
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