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Light and lighting (1908)
Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 331
20 10 … 25 c.p. 16 c.p 50 c.p. 32 c.p. 100 cp. 1014 101. 1016 1917 1918 Fig. 2.—Annual demand for various candlepoweis; vacuumlamps onty. During war period. THE ILLlMINATIXG ENGINEER (NOV. 1919) 321 IT5 c.f o \° 10 3530Q5 Fig. 3.—Annual demand for variouscandlepowers; gas-filled lamps. Approx. c.p. Watts…Lighting
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