18 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 162. 
31 Bailey (L. W.) The Bay of Fundy trough in American geological 
history. 
Can. Roy. Soc, Proc. and Trans., 2d ser., vol. iii, sect, iv., pp. 107-116, 
1898. 
Discusses the geologic history of the region. 
32 Some typical sections in southwestern Nova Scotia. 
Brit. Assoc. Adv. Sci., Rept. 1897, p. 640 (£ p.), 1898. 
Contains brief notes on the stratigraphy and structure of the region. 
33 Bain (Harry Foster). Geology of Polk County [Iowa]. 
Iowa Geol. Surv.. vol. vii, pp. 265-412, pis. vii-ix, figs. 38-66, with 
geologic map, 1897. 
Describes the physiography, the occurrence, and character of the 
Carboniferous and Pleistocene strata, and the occurrence of coal, clay, 
and road materials. 
34 Geology of Guthrie County [Iowa]. 
Iowa Geol. Surv., vol. vii, pp. 415-487, figs. 67-71, with geologic map, 
1897. 
Describes the physiographic features, the occurrence, and character 
of the Carboniferous, Cretaceous, and Pleistocene formations, and the 
occurrence of coal and clays. 
35 Preliminary outline map of the drift sheets of Iowa. 
Iowa Geol. Surv., vol. viii, pi. iii, 1898. 
36 Geology of Decatur County [Iowa]. 
Iowa Geol. Surv., vol. viii, pp. 258-309, pis. xxi-xxiv, figs. 9-10, with 
geologic map, 1898. 
Describes the physiographic features, the occurrence, and character 
of the Carboniferous and Pleistocene formations, and the occurrence of 
coal, clay, and building stone. 
37 Geology of Plymouth County [Iowa]. 
Iowa Geol. Surv., vol. viii, pp. 318-366, pis. xxv-xxix, fig. 13, with 
geologic map, 1898. 
Describes the physiographic and stratigraphic features, the occur- 
rence, and character of the Cretaceous and Pleistocene formations, and 
the occurrence of clay, cement, and coal. 
38 Properties and tests of Iowa building stones. 
Iowa Geol. Surv., vol. viii, pp. 370-416, pis. xxx-xxxii, 1898. 
Describes the essential properties of building stones and the character 
of some material from Iowa. 
39 The Bethany limestone, at Bethany, Missouri. 
Am. Jour. Sci., 4th ser., vol. v, pp. 433-439, 1898. 
Describes the character and occurrence of the series at the locality 
and in Iowa. Gives lists of fossils determined and the author's classi- 
fication. 
40 The Aftonian and pre-Kansan deposits in southwestern Iowa. 
Iowa Acad. Sci., Proc, vol. v, pp. 86-101, pis. v-vii; Abstract, Am. 
Geol., vol. xxi, pp. 255-262, 1898. 
Describes the evidence of two drift sheets and its bearing on the 
evidence of a pre-Kansan drift. 
