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More Light

MORE LIGHT A comparison of all the effects of the different forms of Pavement and Floor Illumination has shown that the installation of
"BAR-LOCK" Galvanized Wrought-Steel Construction and
"3"-Point
Prisms		 One Third Size GIVES 100 Per
Cent Added Light
77 per cent Glass Area, Perfect Light Refraction
AMERICAN BAR-LOCK CO., 26th Street and Pennsylvania Avenue, Philadelphia, Pa.

The National Builder, July 1905