glassmaking (glasma" king)

The making of gla or gla ware. The proce of making gla consists e entially of the fusing together in a gla furnace, usually in a fire-clay melting-pot or crucible, of the ingredients, after mixing them well, and the subsequent treatment of the molten ma or metal in accordance with the quality of the product or the uses which it is to serve. After vitrification is complete and the scum of impurities or gla -gall which rises to the surface has been removed, the temperature of the furnace, which may have reached from 10,000° to 12,000° F., is considerably reduced, so as to bring the fluid and limpid metal into a condition of viscosity, rendering it capable of being worked. The working, by which means the gla is made to a ume its definitive form, is in general performed by blowing (see gla - blowing ), casting, or pre ing in molds. See flint - gla , gla - cutting, gla - furnace, plate - gla . gla man (glas'man), n.; pl. gla men (-men). One who makes or sells gla ; also, one who inserts window-gla in sashes; a glazier. Where have you greater atheists than your cooks? Or more profane, or choleric, than your gla men? B. Jonson, Alchemist, iii. 1. gla -metal (glas'metal), n. The fused and refined material of which gla is made. Let proof be made of the incorporating of copper or bra with gla metal. Bacon , Physical Remains. gla -mounter (glas'mounter), n. One who embellishes gla articles with ornaments. gla ock (glas'ok), n . [Cf. the equiv. gla in , glashan, glo an , glo in ; prob. glas , gray, pale, wan (see Glas- ); cf. Gael. glasag , a water-wagtail, the female of the salmon, glas iasg , gray fish, such as cod, ling, haddock.] The coalfish. [Local, Eng.]