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Show 24. and silver find their lead, the history copper, paint, is of the consumed for of which almost output largely galvanizing, duction is for coin and in the arts, while use in and in brass. comparatively recent, The waste of the smelting zinc mines leased. are lessees to mine and leave the remedy this under the only well as its pro largely is great. very in concentra- sulphides (sometimes 30%). because of its peculiar nature, tities in is used in Although its value of copper results tion, especially Zinc paint. parallels as lost is in in Excessive large quan Most mining. Zinc, of the the royalties tempt only the high grade, easily available rest. The conditions of the the Gold and Silver, evil. of present perfected systems leases ore might precious metals, handling, suffer the natural wear. With all these metals the chief life stitution. plication Conservation of these of all the sense common products yet saver is sub- means an mentioned and ap- a concerted effort toward the ultimate good of the whole. ALIDUNIDJ. lesser metals aluminum is Of all the which appears in enough abundance to tion. to As yet difficulty the in output is extracting. per and iron, aluminum has a a useful only one justify considera insignificant, As the due largely substitute for copfUture. |
