Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 547
ry lamp is subjectto a photometric test. The photometeri^ sel to read the Btandard candle-powerand the corresponding voltage and currentare measured. (The writer considershimself fairly at home with a photo-meter, but be was nevertheless impn—d We found «>iir visit a most interestingon.-, ami it… … Winding filaments. Note the special stand lamps equipped with conical shadeswhich completely conceal the filaments from the eyes of worto l>\ the machine-like celerity with whichtli<- girls in charge of 111i — operation wentthrough their work. To test Beveralthousand lamps a day in t!ii-…
Lighting
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