Original 1921 electrical trade vintage magazine ad for the AMERICAN LAVA CORPORATION. Main office and plant were located in Chattanooga, TN.

Manufacturers of LAVA, The Superior Machined Insulation. 'More Reliable than the Conductor it Protects'.

The mineral Steatite, Lava - a machined insulation, is absolutely unaffected by any temperature under 2000 degrees Fahrenheit. In the construction of arc lamps, rheostats, electrical heating apparatus, etc., it will successfully withstand greater heat than the conductor it protects. It has no superior in which standing the electric arc and is unaffected by most acids and alkali.

Unbound from a rare 1921 Electrical World magazine, this unique old one-page technical magazine advertisement would display beautifully matted and framed. Awesome graphics. A fabulous addition to your retro electrical industry library.