262 NEW YORK STATE MUSEUM 



Wright, G. F. The supposed post-glacial outlet of the Great lakes through 

 Lake Nipissing and the Mattawa river. Geol. soc. Am. Bui. 4:423-25. 

 1893. 



Age of Niagara falls as indicated by the erosion at the mouth of 



the gorge. Abstract, Am. ass'n adv. sci. Proc. 47:299-300; Abstract, 

 Science, n. s. 8:502; Abstract, Am. geol. 22:260, 261. 1898. 



New method of estimating the age of Niagara falls. Pop. sci. mo. 



55:145-54, 6 fig. 1899. 



Lateral erosion at the mouth of the Niagara gorge. Abstract, 



Science, n. s. 10:488. 1899. 



