sentences:  The Indiana Gas Boom transformed the region, as manufacturers moved to the area to utilize the natural gas and railroad system.During 1901, Indiana state inspectors visited 21 manufacturing facilities in Blackford County, and these companies employed 1,346 people (compare to 171 two decades earlier).Since these inspections were in Hartford City and Montpelier only, additional manufacturing employees from the county's small communities (such as Millgrove's glass factory) could be added to the count of 1,346.