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 On the Movements of the Glacial Era in tlie Valley of the St. Lawrence. 



Proc. Am. Assoc. Adv. Sci., 18G6, xv. 43-54. 

 On the Fresh- Water Glacial Drift of the Northwestern States. Smithsonian 



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 Abstract of Remarks upon the Occurrence of Iron in Masses. Proc. Am. 



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 On the Cause of the Transient Fluctuations of Level in Lake Superior, Proc. 



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 Sudden Fluctuations of Level in Quiet Waters. Records of Observations. 



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 Physical Geology of Lake Superior. Proc. Am. Assoc. Adv. Sci., 1875, 



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 On the Origin of Mineral Veins. Proc. Am. Assoc. Adv. Sci., 1876, xxv. 



213-216. 

 See T. C. Chamberlain, and Foster and Whitney. 

 Wichmann, Arthur. 



A Microscopical Study of some Huronian Clay Slates. Quart. Jour, Geol. 



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 Wight, O. W. - 



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 Williams, C. P., and J. F. Blandy. 



Some Contributions to a Knowledge of the Constitution of tlie Copper Range 



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Wilson, Daniel. 



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First Biennial Report of the Progress of the Geological Survey of Michigan. 

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* Geological Map of Michigan. Philadelphia, 1866. Leonhard's Jahrbuch, 

 1868, pp. 99-101. 



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The Diagonal System in the Physical Features of Michigan. Am. Jour. Sci., 

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