From the article: “The picture tube, only 2-5/8 inches thick, is made of two rectangular pieces of plate glass with about an inch of space between them. The edges are sealed with powdered-glass solder to hold the vacuum. The surface of the thin tube is the equivalent of a 21-inch conventional screen.”
[Modern Mechanix via MAKE – ShoutIt]
From the article: “The picture tube, only 2-5/8 inches thick, is made of two rectangular pieces of plate glass with about an inch of space between them. The edges are sealed with powdered-glass solder to hold the vacuum. The surface of the thin tube is the equivalent of a 21-inch conventional screen.”
[Modern Mechanix via MAKE – ShoutIt]