| Show The Chicago Tribune has some alumi nium figures which are Interesting IL production for producton commercial purposes pur-poses began In 18S9 with a total output out-put of 47108 pounds In 1S3S it had j reached 5200000 pounds and the present pres-ent rate a production is I producton ocr 7000000 pounds annually it beginning i to bon bo-n rival ot copper In electrical work Tho Electrical Review says that four years i ago aluminium was but aro little used ltte as a a conductpr of electricity Ju place of p ot cop I per wire but now Us largest use Is for II that purpose as It has proved to be cheaper and in some respects better than copper As its electrical conductivity conduc-tivity weight for weight is much IIi I-Ii greater It has been found practicable to use lighter cables of aluminium than of copper and tower posts are required for supporting tho cables Whllo copper cop-per his steadily advanced In price aluminium has aa steadily diminished although there Js no competition In its production The Review antlclpatca that before long It will displace copper entirely in the bronze foundries When aluminium < a little cheaper Its uses will be extended to Q thousand fields i I is ono of the cleanest lightest and I most attractive of metals I |