BIBLlbGRAPHY OF NOETH AMERICAN GEOLOGY, 1906 -1907. 91 
Hartzell, J. Culver. 
1087. Conditions of fossil ization. — Jour. Geology, vol. 14, no. I, pp. 269 289, 
14 figs., 1906. 
Describes the conditions in which fossils occur, reviews the usage of authors in regard 
to the terms original, mold, and cast, gives definitions for these terms, and discu 
the mineralization and preservation of invertebrates as affected by the lithological char- 
acters of formations. 
Harvard University. 
1088. Nathaniel Southgate Shaler. — Science, new ser., vol. 23, pp. 869-872^ 
June 8, 1006. 
" Minute adopted by the Faculty of Arts and Sciences of Harvard University." 
Hastings, John B. 
1089. Aire the quartz veins of Silver Peak. Nevada, the result of magmatic 
segregation?— Am. Inst. Min. Eng., Trans., vol. 30, pp. 647-654, 1 fig., 1906; Bi- 
Mo. Bull., no. 1 [71, pp. 9-16, 1 tit;.. January. 1906. 
1090. The geology of Goldfield, Nevada. — Eng. and Min. Jour., vol. 81, pp. 
843-844. 2 tigs.. May 5, 1900. 
Hastings, John B., and Berkey, Charles" P. 
1091. The geology and petrography of the Goldfield mining district. Nevada. — 
Am. Inst. Min. Eng., Bi-Mo. Bull. no. 8, pp. 295-314, 2 figs., March, 1906; Trans., 
vol. 37, pp. 140-150. 2 figs.. 1907. 
Hatcher, John Bell. 
1092. The Ceratopsia : History of discovery, classification, osteology, and 
systematic descriptions. — U. S. Geol. Survey, Mon.. vol. 49, pp. 3-157, 1007. 
Hatcher, John B., Marsh, Othnie' C, and Lull, Richard S. 
1093. The Ceratopsia. — U. S. Geol. Survey. Mon.. vol. 40. 300 pp., 51 pis., 
12o tigs.. 1007. 
Hately, J. Geo. 
1094. Copper mining on the Colorado River. — Min. World, vol. 20, p. 809, 
1 fig., June 20. 1907. 
Haultain, H. E. T. 
1095. Corundum at Oraigmont [Ontario]. — Canadian Min. Jour., vol. 28, 
no. 12 (new ser., vol. 1. no. 10), pp. 201-20(J. 3 figs.. August 1. 1907. 
Haupt, Tew is M. 
1096. Changes along the New Jersey coast. — New Jersey Geol. Survey. Ann. 
Kept, state Geologist for 1905, i>i>. 27-0."), is pis.. 1906. 
Haven, G. T. 
1097. Volcanoes give United States two islands.— Mineral Collector, vol. 14. 
no. 1. pi>. 1-3. March, 1007. 
Haworth, Erasmus. 
1098. History, geography, geology, and metallurgy of Galena-Joplin lead 
and zinc — Kansas, Univ. Geol. Survey, vol. 8, pp. 1-126, 23 pis.. 7 tigs.. L904. 
Describes the development of the lead and zinc industry and the geology of the lead 
and zinc deposits of Kansas, and discusses the origin of the ores. 
Economic geology of the Independence quadrangle, Kansas.— See Schrader 
and Haworth, no. 2144. 
Hay, Oliver P. 
1099. Descriptions of two new genera {Echmatemys and ZenochcJys) and 
two new species (Xenochelys formosa and Terrapehe putnami) of fossil tur- 
tles.— Am. Mus. Nat. Hist., Hull., vol. 22. pp. 27-31. 7 tigs.. 1906. 
