Society of Glass Technology · [Sheffield] · leaf 557
ay, the effect, when thecontact due to the thermostatreaching the required tem-perature was made, was to^s.Lf\j short-circuit the relay and todissipate the energy throughthe closed contact and thesparking was eliminated.M. P. j?oiri.y r\ —> i i -i —l ^g J, 1) f 159. A Method of Main-taining… … Fia. 76. DECORATED GLASS. 113 on objects under investigation, and consisted essentially in surround-ing the object with a stream of cold, dry air obtained from theapparatus shown by the evaporation of liquid air. The coil, C,was electrically heated and the object placed in the vacuum-walledportion,…
Glass
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