Issue does not carry date of publication. Generally covers May 1, 1949 - April 30, 1950. Time periods for which statistics are given occasionally vary.
The object of the experiments described in this report was to develop the use of Oregon material to produce a low-cost flux for commercial ceramic use. The materials tested include volcanic ash, pumice, and, a material new to the ceramic field as a flux, perlite. These materials were combined with...