tin

A metallic element known since the beginning of the Christian era, although confounded at that time with lead. Symbol, Sn (from stannum); atomic weight, 1 1 7.8; sp. gr., 7.293. List of poisons and their antidotes, see in appendix, page 939. solution of chlorid of t. A preparation made by heating granulated t. with water and hydrochloric acid until no more gas is obtained, adding water and boiling with the undi olved t. [Br. Ph.].