BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 165 
Savage, T. E. — Continued. 
2127. Report of the assistant state geologist [Iowa]. — Iowa Geol. Survey, 
vol. 16, pp. 13-15, 1906. 
A brief report of work done in 1905. 
2128. Geology of Jackson County [Iowa]. — Iowa Geol. Survey, vol. 16, pp. 
563-64S, 15 figs., 2 geol. maps, 1906. 
Describes the topography and drainage, the stratigraphy, including Ordovician, Silu- 
rian, Devonian, and Carboniferous strata, and glacial deposits, and the economic products. 
2129. Water resources of the Springfield quadrangle [Illinoisl. — Illinois State 
Geol. Survey, Bull. no. 4, pp. 235-244, 1907. 
Includes notes on the physiography, geology, and underground waters. 
2130. Geological map of Iowa. — Iowa Geol. Survey, 1907. Scale 8 miles to 
1 inch. 
Pike County [Illinois] gas field. — See Blatchley, no. 245. 
Scalia, S. 
Geologie des environs de Zacatecas. — See Burckhardt and Scalia, no. 363. 
Schaeberle, J. M. 
2131. An ignored theory of the ice age. — Science, new ser., vol. 24, pp. 439- 
440, October 5, 1906 ; p. 695, November 30, 1906. 
Schaaf-Regelman, E. 
2132. Rare metals and minerals and their uses. — Eng. Mag., vol. 33, no. 1, 
pp. 91-98, April, 1907. 
2133. Asbestos: its mining, preparation, markets, and uses. — Eng. Mag., 
vol. 34, no. 1, pp. 68-80, 11 figs., October, 1907. 
Schaller, \Yaldemar T. 
2134. Siderite and barite from Maryland. — Am. Jour. Sci., 4th ser., vol. 21, 
pp. 364-370, 3 figs., May, 1906 ; Zeitschr. f. Krystal. u. Mineral., Bd. 42, Heft 4, 
pp. 321-326, pi. iv, 1906. 
Describes the chemical and crystallographic properties. 
2135. The chemical composition of molybdic ocher. — Am. Jour. Sci., 4th ser., 
vol. 23, pp. 297-303, April, 1907 ; Zeitschr. f. Krystal. u. Mineral., Bd. 43, Heft 
4, pp. 331^337, 1907. 
2136. Mineralogical notes. — Am. Jour. Sci., 4th ser., vol. 24, pp. 152-158, 
August, 1907; Zeitschr. f. Krystal. u. Mineral., Bd. 44, Heft 1, pp. 1-8, 1 fig., 
1907. 
Describes purpurite from South Dakota and Connecticut, manganotantalite from Maine, 
evansite from Idaho and Alabama, tourmaline from the Island of Elba, and zinnwaldite 
from Alaska. 
2137. Notiz fiber Bowel lit unci Molybdit. — Zeitschr. f. Krystal. u. Mineral., 
Bd. 44, Heft 1, pp. 9-13, 11)07. 
The mercury minerals from Terlingua, Texas; kleinite, terlinguaite, egle- 
stonite, montroydite, calomel, mercury. — See Hillebrand and Schaller, no. 1161. 
Scheffel, Earl R. 
2138. The origin of Spring Valley gorge. — Denison Univ., Sci. Lab., Bull., 
vol. 13. art. 6, pp. 154-166, 3 figs., September, 1007. 
Schneider, Philip F. 
2139. The paleobotany of Onondaga. — Abstract : Onondaga Acad. Sci., Proc, 
vol. 1, pp. 31-32, 1903. 
Includes notes upon the fucoids of the Medina, Clinton, and Niagara formations. 
