42 fitlltfOGRAPHV AND INDEX OF N, A, GKOLOOY, tMUiM 
187 Hastings (John B.). The Atlanta lode, Idaho* 
Eng. and Mg. Jour., vol. lix, p. 128. 
Describes the occurrence of gold ore at this locality. 
188 Subclassiiication of zenogenous ore deposits. 
Eng. and. Mg. Jour., vol. lix, pp. 268-269. 
Discusses some recent proposed classifications of ore deposits. 
189 Haworth (Erasmus). The stratigraphy of the Kansas Coal Meas- 
ures. 
Kans. Univ. Quart., vol. iii, pp. 271-290, pi. xx. 
Describes the character and distribution of the strata which form the 
Coal Measures, and discusses tho conditions of their deposition. In- 
cludes a generalized vertical section of the Coal Measures. 
190 Division of the Kansas Coal Measures. 
Kans. Univ. Quart., vol. iii, pp. 291-295. 
Discusses the evidences of changes in the strata upon which to base a 
subdivision of the Coal Measures. 
191 The eoal fields of Kansas. 
Kans. Univ. Quart., vol. iii, pp. 297-309. 
Describes the area of the coal fields and the geologic position of the 
coal beds, and discusses the physical and chemical properties of the coals. 
192 Stratigraphy of the Kansas Coal Measures. 
Am. Jour. Sci., 3d ser., vol. 1, pp. 452-466. 
Describes the distribution of the Mississippian formation which forms 
the floor of the Coal Measures. Gives the thickness of the various series 
of limestones and shales which comprise the Coal Measure formation, as 
shown by outcrops and records of well borings, and describes their dis- 
tribution. Gives lists of fossils collected from several horizons. Dis- 
cusses the ratio of limestone to shales. Includes a map showing the line 
of outcrop of the various subdivisions, a generalized vertical section of 
the Coal Measures, and the section shown by a boring at Topeka to a 
depth of about 1,600 feet. 
193 Oil and gas in Kansas. 
Abstract : Am. Assoc. Adv. Sci., Proc, vol. xliii, pp. 229-236. 
Describes the past production of oil and gas in southeastern Kansas 
and the character and distribution of the Coal Measure shales and sand- 
stones in which they occur. Discusses the relation of oil and gas to 
anticlinals and synclinals and the evidences as to their original source. 
194 Hay (O. P.). Description of a new species of Petalodus (P. secu- 
riger) from the Carboniferous of Illinois. 
Jour, of Geol., vol. iii, pp. 561-564. 
Describes and figures the characters of the dentition of Petalodus 
securiger and compares it with P. destructor. 
195 Hay (Robert). Water resources of a portion of the Great Plains. 
U. S. Geol. Surv., 16th Ann. Rept., part ii, pp. 535-588, pis. xl-xlii, figs. 
58-65. 
Describes the hydrographic, geologic, and topographic features and 
water-bearing formations of a portion of western Kansas and Nebraska 
aud eastern Colorado. 
