The table is intended to relate to lighting equipment as of the end of the fiscal year of the city, including equipment ... under the heading aquot;Incandescentaquot; comprise both the vacuum and nitrogen gas filled types, including mazda, other tungsten, other ... This variation arises largely because of differences in the candlepower of the lamps, the number of hours per year ... underground electric distribution systems, between lighting furnished by the city and by public- service corporations, andanbsp;...
Title | : | General Statistics of Cities: 1916 |
Author | : | United States. Bureau of the Census, Starke McLaughlin Grogan, Arthur J. Hirsch, Lemuel A. Carruthers, August H. O. Rolle, Morris J. Hole |
Publisher | : | - 1917 |
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