Show asting ills it lS iron II 11 willa copper ai been introduced for pro pra A briw st nud find iron ia by r dincans of it n coci coit fg the invention when wu was dropper copper jug falade de it lv was applied to the con construe a 0 of f tele graph wire but since c thun then jw tio n halev lievi I 1 tvr it ialo to be 8 employed in the tile aire of 0 complete ship the tile metud nie thoi ture loyed is similar ar to that of the old silver ci er lip process in abich plates of tin the tac plating together ether without 1113 were rolled to liny tiny the mical or electrolytic means acin being en ein aloyed p A shirt corper copper ingot is cast emst ca st on a core ol 01 it iron or steel the tile copper is shorter than tha tb wre core ami not kllc pineal al symmetrically ut he di posed toward one end that the unequal artl of the co coating ting when afterward extended t n ia hy by rolling ma may y be ile fo or r sivo for the provision v bion of special sroor in alg of the rollers to prevent the formation of oens cinq of the life softer metal arx tal the sub subsequent jt operations are conducted in way ay advantage Adran tage I 1 is taken of the retention of heat by the steel core to diminish the excessive ductility of the copper by chill cbill ing ng the covering when the porosity of the coat of copper and the difficulty in oli olk berf perfect act adherence is ii overcome the process will become a commercial pittsburg |