Masonry Magazine September 1969 Page. 27
Solid glass bricks will stop a burglar. (And practically anything else.)
Here's a product that means business today. Solid glass bricks by Pittsburgh Corning. They're built to stop a burglar, a rock, a looter and more... all those things which can break open your customers' places of business (and close them down in a hurry, too). When you replace window areas with solid glass bricks, the only thing that comes through the panel is light.
For more information on solid glass bricks, write: Pittsburgh Corning Corporation, Dept. MA-99G, One Gateway Center, Pittsburgh, Pa. 15222.