Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 336
firstexperimented with in 1915, owes itssuccess partly to the new form of ioniserand partly to an improved type of elec-trode. The plate is strong mechanically,and a life of 250 hours at a specific con-sumption of 0*5 watts per candle wasobtained. The year 1918 was devoted mainlyto improvements in… … ROYAL EDI SWANPOINTOLITE (PATENT) ¥ Fig. 2.—General appearance of 2-electrodePointolite lamp. %7^BJM!M^MfflL
Lighting
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