STUDIES ON THE THERMAL CONDUCTIVITIES OF SOME REFRACTORY MATERIALS1

The method used was a modification of that described by Hepplewhite. The changes made were for the purpose of insuring greater accuracy. An effective means for preventing lateral flow of heat was devised. The coefficients obtained for the several materials studied were (c. g s. units) silica brick .00099, fire clay brick .00169, fire clay slab .00203, light weight fire clay brick .00251, sillimanite brick .00432, electrically sintered magnesia brick .00665, “Alundum” fire brick .00833, “Crystolon” silicon carbide brick .00982. The work for this paper including the design, erection and operation of the apparatus, most of the calculations and the preparation of the detailed report was done by 0. S. Buckner.]