Show IRON DEPOSITS OF WORLD i present sources of supply will be exhausted in years chicago feb 10 one hundred years will probably see sec the ilie exhaustion of the worlds present iron ore sources according to dr C kenneth leith professor of geology in the university of wisconsin who lectured last night on the subject before the geological society according to prof leith tho the present known depo deposits sitt of high grado grade ore in the united states will be exhausted in a comparatively short period of time and then the low grade deposits will be drawn upon with the result of changing the geological toca alon of the great steel and iron plants 0 of f te le t e country it is probable that the entry of low grade ores into the iron industry will have the effect of bringing the furnaces nearer the base of supply said dr leith and this means the removal of tho iron centers from pittsburg and other eastern points to chicago and points farther west there are aire deposits of low grade ore in colorado and wyoming but it will bo be many years before they will become factors of commercial importance 11 |