CUTTING GLASS.

Ohinemuri Gazette, Volume XXX, Issue 4060, 29 December 1919, Page 4

CUTTING GLASS.

It is commonly thought that glass is impervious to the assaults of age. But this is not the case, Glass, if exposed to the elements, will, Dice most other substances, decay, and in course of time become bo rotten as to be worthless. Window glass exposed to cold, heat, and varying winds will, after a number of years, become so brittle that it can be cut with a pair of scissors. Light and darkness, again, have such dirfer--ent effects on glass that their alternation alone, it is said, is enough to make the substance fragile. Any builder or glazier will tell you how much easier it is to remove new. windows from a building than old; ii? fact, if they are really old, it is almost impossible to move them at all without breaking some of the panes. The reason is that glass which has faced the weather for a number of years loses'the elasticity it undoubtedly possesses when new. Itinerant vendors of cneap cutlery have oftea been known greatly to impress wondering crowds w:i."n the excellence of their wares by clipping off strips of " glass with scissors and shears. Of course, the glass they use for this purpose is very, very ola.