Lava Insulator formula described in card

[Trade Journal]

Publication: Western Electrician

Chicago, IL, United States
vol. 36, no. 22, p. 445, col. 3

PUBLICATIONS.

H2Mg3Si4O12 is the formula for the material which in manufactured form is known as Lava, made by the American Lava Company of Chattanooga, Tenn., and described by the company in an attractive mailing card which it is sending out to the trade. This material is used in instruments requiring a fixed relation of their parts under all conditions, as it neither swells nor shrinks in atmospheric moisture, and its temperature coefficient of expansion being negligibly small.

Keywords:	American Lava Company : Lava Insulator
Researcher notes:
Supplemental information:
Researcher:	Bob Stahr
Date completed:	March 17, 2009 by: Bob Stahr;