1 34 TJic American Geologist. February, i899 
Upham, Warren. 
Fluctuations of North American glaciation shown by interglacial 
soils and fossiliferous deposits. [Abstract.] (Proc. A. A. A. S., vol. 
47, p. 297, Dec. 1898.) 
Upham, Warren. 
Time of erosion of the upper Mississippi, Minnesota, and St. 
Croix valleys. [Abstract.] (Proc. A. A. A. S., vol. 47, pp. 297-298, Dec. 
1898.) 
Vaughan, T. W. (Hill, R. T., and) 
Geology of the Edwards plateau and Rio Grande plain adjacent 
to Austin and San Antonio, Texas, with reference to the occurrence 
of underground waters. (U. S. Geol. Survey, i8th Ann. Rept., pt. 2, 
pp. 193-321, pis. 21-64, 1898.) 
Veeder, M. A. 
Changes in the drainage system in the vicinity of lake Ontario 
during the Glacial period. [Abstract.] (Proc. A. A. A. S., vol. 47. 
p. 29S, Dec. 1898.) 
Wheeler, W. IVI. 
George Baur's life and writings. (Am. Nat., vol. 33. pp. 15-30, 
portrait. Jan. 1899.) 
Willmot, A. B. 
Notes on the Michipicoten gold field. (Jour. Federated Canadian 
Mining Inst., vol. 3, pp. 100-102. 1898.) 
Winchell, N. H. 
The oldest known rock. [Abstract.] (Proc. A. A. A. S., vol. 47. 
pp. 302-303, Dec. 1898.) 
Winchell, N. H. 
The origin of the Archean igneous rocks. [Abstract.] (Proc. A. 
.\. A. S., vol. 47, pp. 303-304. Dec. 1898.) 
Winchell, N. H. 
Thalite and bowlingite from the north shore of lake Superior. 
(Am. Geol., vol. 23, pp. 41-44. Jan. 1899.) 
Wright, G. F. 
Supposed "corduroy road" of late glacial age, at Amboy, Ohio. 
[Abstract.] (Proc. A. A. A. S., vol. 47. P- 298. Dec. 1898.) 
Wright, G. F. 
The age of Niagara falls as indicated by the erosion at the mouth 
of the gorge. [Abstract.] (Proc. A. A. A. S., vol. 47, pp. 299-300. 
Dec. 1898.) 
Wright, G. F. 
A recently discovered cave of celestite crystals at Put-in-Bay. 
Ohio. [Abstract.] (Proc. A. A. A. S.. vol. 47. p. -300, Dec. 1898.") 
Yeates, W. S. 
Administrative report of the state geologist [of Georgia] for the 
year ending October 15th, 1898. (Geol. Survey of Ga., 19 pp.. 1898.) 
