III -The Annealing of Glass.

JSGT 1917 V01 T061-T074

 THE subject of the annealing of glass has always been a matter of great importance for my firm. But my interest in it was until recently solely that of tlle optical glass worker, and I was chiefly
concerned with the conditions for annealing fairly massive pieces. The degree of annealing required for such pieces when they are to be used for the best class of optical work is much higher than is necessary for glassware.

By F TWYMAN