. History of Shiawassee and Clinton counties, Michigan . BOUNDARIES, TOPOGRAPHY, AND MINERAL RESOURCES. 333 purpose of discovering coal), reached a depth of one hun-dred and sixty-seven feet, disclosing no coal-vein. From the time when the territory of Clinton Countyfirst became known by white men, it was believed that val-uable salt-springs existed along the valley of the MapleRiver, and this belief resulted in explorations, with a viewto their discovery and development. The principal exami-nation of the country to this end was made by the Stategeologist, Dr. Douglass Houghton, in 1837, a rep


. History of Shiawassee and Clinton counties, Michigan . BOUNDARIES, TOPOGRAPHY, AND MINERAL RESOURCES. 333 purpose of discovering coal), reached a depth of one hun-dred and sixty-seven feet, disclosing no coal-vein. From the time when the territory of Clinton Countyfirst became known by white men, it was believed that val-uable salt-springs existed along the valley of the MapleRiver, and this belief resulted in explorations, with a viewto their discovery and development. The principal exami-nation of the country to this end was made by the Stategeologist, Dr. Douglass Houghton, in 1837, a report ofwhich was made by him in January, 1838, from which re-port an extract, having reference to his examinations inthe northwest township of Clinton County, is here given,viz.: It has been known from the earliest settlement of thecountry that the Indians formerly supplied themselves withsalt from .springs occurring on the peninsula; numerousreservations of lands supposed to contain salt-springs havebeen made by the United States. Many years ago severa


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