52 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 162. 
379 Horsewill (T. J.). Tesla coal mines [Alameda County, California]. 
Mines and Minerals, vol. xix, pp. 145-147, 5 figs., 1898. 
Describes the occurrence of coal. 
380 Hosea (R. M.). Anthracite in the Rockies. 
Mines and Minerals, vol. xviii, pp. 529-533, 5 figs. : vol. xix, pp. 7-9, 2 
figs., 1898. 
Describes occurrence of anthracite coal in Colorado. 
380a Hovey (E. O.). Catalogue of the meteorites in the collection of 
the American Museum of Natural History to July, 1896. 
Am. Mus. Nat. Hist., Bull., vol. viii, pp. 149-155, 1896. 
380ft Notes on the artesian well sunk at Key West, Florida, in 1895. 
Harvard Coll., Mus. Comp. ZooL, Bull., vol. xxviii, pp. 65-91 ; Abstract, 
Am. Geol., vol. xviii, p. 218, 1896. 
381 See Whitfield (R. P.), No. 877. 
382 Hull (Edward). Prof. J. W. Spencer on changes of level in Mexico. 
Geol. Mag., dec. iv, vol. v, pp. 193-195, 1898. 
Reviews recent papers by J. W. Spencer. 
I. 
383 Iddings (Joseph P.). On rock classification. 
Jour, of Geol., vol. vi, pp. 92-111, 6 figs. ; Review, Am. Nat., vol. xxxii, 
pp. 465-466, 613-614 ; Abstract, Science, new ser., vol. vii, pp. 83-84 (-J p.), 
1898. 
Discusses the nature and characteristics of rocks, the results of the 
study of the chemical composition of igneous rocks, and the chemical 
relations and nature of rocks genetically connected. 
384 Chemical and mineral relationships in igneous rocks. 
Jour, of Geol., vol. vi, pp. 219-237, pis. ix-x; Review, Am. Geol., 
vol. xxii, p. 381 (| p.), 1898. 
Discusses the occurrence of quartz, and of leucite and nephelite in 
igneous rocks, the interdependence of various minerals, and the chemical 
composition of the magma. 
385 [Review of u Volcanoes of North America: A reading lesson 
for students of geography and geology," by Israel 0. Russell.] 
Jour, of Geol., vol. vi, pp. 434-435, 1898. 
386 Bysmaliths. 
Jour, of Geol., vol. vi, pp. 704-710, 1 fig., 1898. 
Applies the term to an intruded plug or core of igneous rock. 
Describes their manner of occurrence and refers to certain examples. 
387 [Review of "A text-book of mineralogy, with an extended 
treatise on crystallography and physical mineralogy," by 
E. S. Dana.] 
Jour, of Geol., vol. vi, pp. 756-757, 1898. 
