An Apparatus for the Examination of Cords, Inhomogeneities and Surface Unevenness in Glassware

JSGT_1937_V21_T281_T284

The detection of defects within the body and on the surface of glassware, by a contrasting field method, is described. Photographic examples of the visible effects so produced by cords, stones, seed, and surface unevenness are shown.

E. Seddon