OTHER RESOURCES OF MICHIGAN 125 



of fish planted by the Michigan Fish Commission 

 in the year 1920 also includes brown trout, large- 

 mouthed and small-mouthed black bass, bluegills, 

 bullheads, landlocked salmon, and rocky mountain 

 whitefish, whose numbers are in most instances less 

 than one million. 



WATER SUPPLY 



At favored spots along the waterways of Michigan, 

 the early settlers erected their water-wheels and 

 mills, where the farmer ground his grain and re- 

 duced his logs to lumber. Such points were the 

 rapids of the Grand at Grand Rapids, the big rapids 

 of the Shiawassee at Owosso, the big rapids of the 

 Muskegon at Big Eapids and at almost countless 

 other locations throughout the State. Many grist- 

 mills still use this economical source of power, though 

 steam has replaced water as the motive force for 

 the lumber industry. Today, it is hydro-electric 

 power that gives the water-courses of Michigan their 

 chief economic importance. The development under 

 this head gives Michigan a leading place in the 

 United States. The potential water power of the 

 State has been estimated at 332,000 horse power, of 

 which the total actual developed power was put at 

 213,000 horse power.^ The Geological Survey of 

 Michigan has investigated the available water power 

 of the Upper Peninsula. - 



' Statement of tlic National Bank of Commerce in New 

 York, March 10, 1920. 

 ='See 1910 Report. 



