Beta

Found in the Glasgow area by Eddie Mclean.

A Millstone Grit and Fireclay pamphlet ltd, Herbertshire Works, Denny states:-

Alpha – 40 – 42% Alumina. Silica 53.2 %. High Duty Fire Brick.

Beta   – 38 – 40% Alumina. Silica 55.5 %. Medium Duty Fire Brick.

Beta L – For use in Ladles, Tundishes etc.

Alpha + –  42.1% Alumina. Silica 51.3 %. Super Duty Fire Brick.

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