Cement, Extempora′′neo us

1. Shell-lac, melted, and run into small sticks the size of a quill. Used to join gla , earthenware, . The edges are heated sufficiently hot to melt the cement, which is then thinly smeared over them, and the joint made while they are still hot. This is the cement so commonly vended in the streets of London, and which used to surprise us in our boyhood days. 2. Tears of gum mastic, used in the same way. Commonly employed by jewellers and others. Cement, Fire′proof. Prep. From fine river sand, 20 parts; litharge, 2 parts; quick-lime, 1 part; linseed oil, q. s. to form a thin paste. Applied to walls, it soon acquires a stony hardne . It is also used to mend broken pieces of stone, stone steps, . See Cement, Beale’s , .