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Light and lighting (1908)
Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 516
Fig. 3.—General view of new Mazda patentstreet-lighting unit (with street-lighting equipment patent No. 21485/12). … Pig. 2a.—Polar curve of 500-watt 110-voltlamp with fitting shown in Fig. 2. 135* 150° 165* 18 0° 165 ISO* 135 . . I20*| 100 Ft x\\ 1 /?0Vli- SO iii*** 73H ~v> *-i %8^S 00* ■~L§D$L\^\/. jLu8C )3a\^K, 43 — <- 0 30 is ■> IS* pIG 3a.—Polar curve of 300-watt lamp(dotted line) and corresponding…Lighting
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