ECOLOGY OF NORTHERN MICHIGAN. 55 



1904. A Treatise on Metamorphism. U. S. G. S., Monograph XLVII. 

 Weidman, S. 



1903. The Pre-Potsclam Peneplain of the Pre-Cambrian of North Central 

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 Wheeler, W. A. 



1901. Notes on some Plants of Isle Royale. Minn. Bot. Studies, II, 

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 Whitford, H. N. 



1901. The Genetic Development of the Forests of Northern Michigan; 

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 Wilson, A. W. G. 



1903. The Laurentian Peneplain. Jour, of Geol., XI, No. 7, pp. .615-669. 

 Woodworth, J. B. 



1894. The Relation between Baseleveling and Organic Evolution. Am. 

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 Wright, F. E. 



1905. Report on the Progress made by the Porcupine Mountain Party 



During the Summer of 1903. Ann. Rept. Geol. Surv. of Mich, 

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