weeks] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1898. 105 
93(> Wright (G. Frederick). Supposed " corduroy road Ji of late 
glacial age at Amboy, Ohio. 
Abstracts, Am. Assoc. Adv. Sci., Proc, vol. xlvii, p. 298 (£p.); Science, 
new ser., vol. viii, p. 470 (£ p.) ; Am. Geol., vol. xxii, p. 259 (£ p.), 1898. 
937 The age of Niagara Falls, as indicated by the erosion at the 
mouth of the gorge. 
Abstracts, Am. Assoc. Adv. Sci., Proc, vol. xlvii, pp. 299-300; Science, 
new ser., vol. viii, p. 502 (f p.); Am. Geol., vol. xxii, pp. 260-261 (£p.)> 
1898. 
938 A recently discovered cave of celestite crystals at Put-in- 
Bay, Ohio. 
Abstracts, Am. Assoc. Adv. Sci., Proc, vol. xlvii, p. 300 (i p.) ; Science, 
new ser., vol. viii, pp. 502-503 (£ p.); Am. Geol., vol. xxii, p. 261 (ip.), 
1898. 
939 Clayey bands of the glacial delta of the Cuyahoga Biver at 
Cleveland, Ohio, compared with those in the implement- 
bearing deposits of the glacial delta at Trenton, N. J. 
Abstracts, Science, new ser., vol. viii, p. 464 (\ p.); Am. Geol., vol. 
xxii, p. 250 (£p.), 1898. 
940 Glacial observations in the Champlain-St. Lawrence Valley. 
Am. Geol., vol. xxii, pp. 333-334, 1898. 
Describes recent observations by the author. 
Y 
941 Yeates (W. S.), McCallie (S. W.), and King (Francis P.). A 
preliminary report on a part of the gold deposits of Georgia. 
Ga. Geol. Surv., Bull. No. 4-A, 542 pp., 21 pis., 38 figs., 1898. 
Describes the occurrence of gold ores in the State, including local 
details of mines. 
