The Polariscope and its Application to the Glass Industry

JSGT_1919_V03_T256_T260 (3 pages)

The use of a polariscope for detecting strained areas in glass due mainly to faulty annealing is not by any means an innovation but is simply another case of a well-known scientific principle which has come to the fore as a direct result of the war. As far back as the middle of last century the use of such an instrument was suggested as a means whereby either the manufacturer or the housewife could tell the quality of glass articles of everyday use. In the following account a well-known type of polariscope is described, together with a few extra fittings which render it useful as a glass works instrument.

G. V. Wilson