weeks] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1898. 85 
728 Spencer (J. W.) Evidence of recent great elevation of New Eng- 
land. 
Abstracts, Am. Assoc. Adv. Sci., Proc, vol. xlvii, p. 301 (12 l.)j Sci- 
ence, new ser., vol. viii, p. 500 (£ p.) ; Am. Geol., vol. xxii, p. 262 (£ p.), 
1898. 
729 Niagara as a timepiece. 
Can. Inst., Proa, new ser., vol. i, pp. 101-103, 1898. 
Discusses the geologic history of the Niagara River. 
730 Late formations and great changes of level in Jamaica. 
Can. Inst., Trans., vol. v, pp. 325-357, pis. i-vi, figs. 1-7, 1898; Review 
by W. M. Davis, Science, new ser., vol. vii, p. 851 (ip.)j Geol. Mag., 
dec. iv, vol. v, pp. 515-517; Abstract, Am. Jour. Sci., 4th ser., vol. vi, 
pp. 270-272, 1898. 
Describes the topographic, hydrographic, and stratigraphic features 
of the region and its geologic history during Tertiary, Pleistocene, and 
Recent periods. Discusses the correlation of the formations. 
731 Resemblance between the declivities of high plateau and those 
of submarine Antillean valleys. 
Can. Inst., Trans., vol. v, pp. 359-368, figs. 1-6 and map; Review, 
Geol. Mag., dec. iv, vol. v, pp. 514-515 ; Abstract, Am. Jour. Sci., 4th ser., 
vol. vi, pp. 272-273, 1898. 
Describes valleys in the United States and compares them with sub- 
marine valleys. 
732 Another episode in the history of Niagara Falls. 
Am. Jour. Sci., 4th ser., vol. vi, pp. 439-450, 2 figs., 1898. 
Describes recent observations on the geologic history of the Niagara 
River. 
733 An account of the researches relating to the Great Lakes. 
Am. Geol., vol. xxi, pp. 110-123, 1898. 
Reviews the principal results of investigations of the geologic history 
of the Great Lakes. 
734 On Mr. Frank Leverett's "Correlation of moraines with 
beaches on the border of Lake Erie." 
Am. Geol., vol. xxi, pp. 393-396, fig. 1, 1898. 
Discusses the theory of Glacial dams. 
735 On the continental elevation of the Glacial epoch. 
Brit. Assoc. Adv. Sci., Rept., 1897, pp. 651-652, Geol. Mag., dec. iv, 
vol. v, pp. 32-38, 1898. 
Discusses the evidence of such elevation. 
736 The West Indian bridge between North and South America. 
Pop. Sci. Mo., vol. liii, pp. 10-36, 4 pis., 9 figs., 1898. 
Discusses the character of land valleys, submarine plateaus, and 
drowned valleys, and the evidences of a connection between the Atlantic 
and Pacific oceans. 
