A cement used by glaziers for fastening window-glass into the frames; it is used also by carpenters and other artizans for stopping holes in their work: it is made by kneading whiting and linseed oil together into a stiff paste; when dry it is very hard and durable.

Putty Powder of. An oxide of tin, much used in polishing glass and other hard substances. When tin is melted in an open vessel, its surface soon becomes covered with a grey powder, which is the oxide of the metal. If the heat be continued, the grey assumes a yellow tint, which is then called putty