This well-known bearing metal is made by melting separately 8 parts of regulus of antimony, 12 parts of Banca tin and 4 parts of copper, and after fusing same adding 12 parts of tin. The antimony is added to the first portion of tin, and after the melting pot is taken away from the fire, and before the solution is poured into the mold, the copper is introduced. Oxidation is provided against by a surface coating of powdered charcoal. The lining metal consists of this hardening fused with twice its weight of tin, thus making it a compound 88 9-10 parts tin, 7 4-10 parts antimony and 3 7-10 parts copper. The bearing it is designed to line is cast with a shallow recess for the reception of the Babbitt metal. The part to be tinned is to be washed with alcohol and powdered with sal-ammoniac, and those surfaces which are not thus lined are covered with a clay wash. Warmth for the volatilization of a portion of the sal-ammoniac is then introduced, and the substance tinned. The lining is next cast in between a form which takes the place of the journal and the bearing.
(2) There are many compositions made and sold under the name of Babbitt metal. One of the best is copper 1 part, tin 6 parts, antimony 2 parts by weight; melt the copper in a crucible, add gradually one-half of the tin, then the antimony, and then the rest of the tin. Let the temperature gradually fall as the tin is added, and pour into bar molds of iron.