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Halaman 142
1800 1600 1400 AVERAGE LUMENS STREET SERIES MAZDA LAMPS 1200 Lumens TABLE XXVII DISTRIBUTION OF TUNGSTEN FILAMENT LAMPS BY SIZES AND TYPES Vacuum Type 1919 1920 1921 Per Cent Per Cent Per Cent Sign 4.3 5.8 6.1 15 watts 4.1 5.5 3.5 25 ...
1800 1600 1400 AVERAGE LUMENS STREET SERIES MAZDA LAMPS 1200 Lumens TABLE XXVII DISTRIBUTION OF TUNGSTEN FILAMENT LAMPS BY SIZES AND TYPES Vacuum Type 1919 1920 1921 Per Cent Per Cent Per Cent Sign 4.3 5.8 6.1 15 watts 4.1 5.5 3.5 25 ...
Halaman 143
as to initial efficiency and other details of the 100watt vacuum or Mazda B , and the gas filled or Mazda C lamp Mazda Sign Lamps The report last year at page 7 treated at some moth with the subject of new lamps for sign ser; ...
as to initial efficiency and other details of the 100watt vacuum or Mazda B , and the gas filled or Mazda C lamp Mazda Sign Lamps The report last year at page 7 treated at some moth with the subject of new lamps for sign ser; ...
Halaman 144
They should therefore be used only in places where the service is so severe that the standard lamps will not be ... Candelabra Lamps On May 1 , 1921 , the candelabra lamps were transferred from the miniature to the large lamp price Fig ...
They should therefore be used only in places where the service is so severe that the standard lamps will not be ... Candelabra Lamps On May 1 , 1921 , the candelabra lamps were transferred from the miniature to the large lamp price Fig ...
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