It is reported that lamp wattage has been increased to 900 and a tubular bulb used in place of spherical bulb, for the purpose of adapting Mazda lamps for motion picture projection.
Mazda lamps for motion picture projection
Gen. Elec. Rev
General Electric Review ; 22 , n 7
1919
4 pages
11 Figs.
Article (Journal)
English
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