1. 1A.S.T.M. Test for "Permanent Linear Change after Reheating of Refractory Brick ," Manual of A.S.T.M. Standards on Refractory Materials, p.62 (1943 ).
2. 2F. H. Norton , "Theory of Secondary Expansion" in Refractories , 2d ed. , p.536 . McGraw-Hill Book Co., Inc., 1942 ; Ceram. Abs., 22 [6 ] 536 (1942 ).
3. THE OXIDATION OF CERAMIC WARES DURING FIRING.-I. SOME REACTIONS OF A WELL KNOWN FIRE CLAY1