| Show ZINC AND TIN ane united flatea is not a tin producing country out contains many mines of zinc there is hardly a mining district in the west that is without its zinc ores and in some sections zinc ia the predominant metal so much so that the ores are too rebellious to be treated unless marketed tor their zinc values but zinc is a metal of little value and of very limited demand in this country yet we are assured that for purposes zinc sheeting is eu to tin plate and in edeland En eland the greatest tin producing country of the world sheet zino is used for roufina to the exclusion of tin A good tin will last fifteen beare while a zinc roof has a life of twenty to thirty years if zinc roofing was adopted in the united states millions of dollars would be spent in the purchase of the product ot oar zinc mines instead of going across the waters to enrich the tin mine owners of cornwall |
