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Best Lighted Basements, Vaults, Floors and Skylights

Best Lighted Basements, Vaults, Floors and Skylights

ARE THOSE ILLUMINATED WITH

BAR-LOCK Galvanized Wrought-Steel Construction and 3-Point Prisms

Why? 
The Bar-Lock device gives 77 per cent Glass Surface, Affords Greater Refraction, Is the Easiest Installed, Has the Highest Degree of Strength, Perfectly Water-tight, Won't Rust.
For further information address
AMERICAN BAR-LOCK COMPANY,
Office and Works 26th Street and Pennsylvania Avenue, Philadelphia, Pa.
CAUTION — Any person using or selling any infringement of this Company's patents will be prompt prosecuted.

The National Builder, September 1905