weeks] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1898. 23 
83 Blake (William P.). Remains of a species of bos in the Quaternary 
of Arizona. 
Am. Geol., vol. xxii, pp. 65-72, 1898. 
Describes horn cores and reviews the literature describing similar 
material. 
84 Bison latifrons and Bos arizonica. 
Am. Geol., vol. xxii, pp. 247-248, 1898. 
Refers to remains recently described by Dr. Allen. 
85 Native sodium carbonate. 
Eng. and Mg. Jour., vol. lxv, p. 188 (£ p.), 1898. 
Describes occurrence of soda in northern Mexico. 
86 Wolframite in Arizona. 
Eng. and Mg. Jour., vol. lxv., p. 608 (£ p.), 1898. 
Contains brief notes on occurrence in Cochise County. 
87 Blandy (John F.). Mining in Yavapai County, Arizona. 
Eng. and Mg. Jour., vol. lxvL pp. 547-548, 1898. 
Describes the general geology of the region and the occurrence of 
precious metals. 
88 Blatchley (W. S.). The geology of Lake and Porter counties, 
Indiana. 
Ind. Dept. of Geol. and Nat. Res., 22d Ann. Rept., pp. 25-104, pis. iii- 
viii, 1898. 
Describes the physiography, the Devonian and Silurian rocks, and 
the glacial and recent geologic features of the region. Gives sections 
of artesian wells. 
89 The clays and clay industries of northwestern Indiana. 
Ind. Dept. of Geol. and Nat. Res., 22d Ann. Rept., pp. 105-153, pis. ix- 
xi, 1898. 
Describes the character, origin, varieties and properties of clays and 
the clays and clay industries of the region. 
90 The petroleum industry in Indiana in 1897. 
Ind. Dept. of Geol. and Nat. Res., 22d Ann. Rept., pp. 155-184, pis. xii- 
xiii, 1 fig., 1898. 
Describes the mode of formation of oil in the Trenton limestone in 
Indiana. 
91 See Oliphant (F. H.), No. 580. 
92 and Ashley (George H.). Geological scale of Indiana. 
Ind. Dept. of Geol. and Nat. Res., 22d Ann. Rept., pp. 17-23, pi. ii, 1898. 
Gives a brief description of each of the formations occurring in the 
State. 
93 Boss (O. M.). Some dike features of the Gogebic iron range [Michi- 
gan-Wisconsin]. 
Am. Inst. Mg. Engrs., Trans., vol. xxvii, pp. 556-563, 1898. 
Gives local details regarding the dikes of the region. 
