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Effective Simplicity

EFFECTIVE SIMPLICITY
Expert labor is not required to set 3-Point Prisms in our Galvanized Wrought Steel Constructed BAR-LOCK FRAMES
We ship Bar-Lock Frames in suitable sections. Any competent man can assemble them and set the "3-POINT PRISMS" or "ARCH" plain glass.
 About One-Third Actual Size
ABOUT ONE-THIRD ACTUAL SIZE
Adapted to all uses where overhead illumination is required. "3-POINT PRISMS" GIVE 100 PER CENT ADDED LIGHT.
AMERICAN BAR-LOCK COMPANY
Representatives in all large cities. Offices and Works, 26th St., and Pennsylvania Ave., PHILADELPHIA, PA.

The National Builder, April 1905