NIAGARA FALLS AND VICINITY 261 



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Estimates of geologic time. Am. jour. sci. 3d ser. 45:209-20; Sci. 



Am. sup. 35:14. 403-5- 1893- 



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3d ser. 46:114-21. 1893. 



Wave-like progress of an epeirogenic uplift. Jour, of geol. 2:383-95. 



1894. 



The Niagara gorge as a measure of the post-glacial period. Am. 



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Stages of recession of the North American ice sheet, shown by 



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Departure of the ice sheet from the Laurentian lakes. Abstract, 



Geol. soc. am. Bui. 6:21-27. 1895- 



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Beaches of Lakes Warren and Algonquin. Am. geol. 17:4002. 1896. 



Origin and age of the Laurentian lakes and of Niagara falls. Am. 



geol. 18:169-77, fig. I. 1896. 



Niagara gorge and Saint Davids channel. Geol. soc. Am. Bui. 



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4, pt I. 1900. 

 Westg-ate, Lewis G. Geographic development of the eastern part of the 



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by the results of a recent survey. Am. ass'n adv. sci. Proc. 35:222. 



1886. 

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1870. 

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28:33-35. 1884. 

 ■ The ice age in North America. Appleton. 1889. 



