Summary

The New International Encyclopædia…

It is the commercial centre of the State; is extensively engaged in gold, silver, and iron mining; and has foundries and machine-shops, flour, saw, and planing mills, quartz-crushing plants, and smelters. From the famous Last Chance Gulch which traverses the city, it is estimated that more than $30,000,000 worth of gold has been mined. Helena was settled as a mining camp in 1864, and laid out as a town in the same year, and was incorporated in 1881.
Source: Wikisource

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