Evening Republican, Volume 15, Number 247, Rensselaer, Jasper County, 19 October 1911 — Tempering Glass. [ARTICLE]

Tempering Glass.

Lamp chimneys, tumblers and crockery of any kind may be rendered proof against sudden changes of pemperar ture thus: Put the article into a saucepan of cold water in which has been dissolved, a handful of common salt Bring the water gradually to a boil and allow to boll for a quarter of an hour. Then slowly cool. Articles so treated will stand any sudden changes of temperature wlthmm| cracking. ...-