BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 143 
Ordonez, Ezequiel. 
1824. Sobre algunos ejemplos probables de tubos de erupcion. — Soc. cient. 
"Antonio Alzate," Mem. y Rev., t. 22, pp. 141-150, 1905. 
Describes probable examples of volcanic necks. 
1825. Las rocas arcaicas de Mexico. — Soc. cient. "Antonio Alzate," Mem. y 
Rev., t. 22, nos. 7-8, pp. 315-531, 1 pi., 1905. 
1826. Los xalapazcos del Estado de Puebla. Segunda parte. — Mexico, Inst. 
Geo!., Parer., t. 1, no. 10, pp. 349-393, 10 pis., 7 figs., 1906. 
Describes physical features and geological structure of volcanic craters in the State 
of Puebla, Mexico. 
1827. Excursion de Mexico a Jalapa [Mexico]. — X e Congr. geol. intern., 
Guide des Excursions, Mexico, no. I, 11 pp., 1906. 
Describes the geology of the country along the route traveled. 
1828. Excursion de Esperanza a Mexico. — X e Congr. geol. intern., Guide des 
Excursions, Mexico, no. Ill, 2 pp., 1906. 
Gives notes on the geology of the country between these places. 
1829. L'arcbaique du Canon de Tomellin. — X e Congr. geol. intern., Guide des 
Excursions, Mexico, no. V, 30 pp., 1 pi., 1906. 
1830. Excursion de Mexico a Patzcuaro et Uruapam. — X e Congr. geol. in- 
tern., Guide des Excursions, Mexico, no. VIII, 18 pp., 1 pi., 1906. 
Describes the geology of the country between these places. 
1831. Le Jorullo. — X e Congr. geol. intern., Guide des Excursions, Mexico, 
no. XI, 55 pp., 12 pis., 1906. 
1832. Les crateres d'explosion de Valle de Santiago [Mexico]. — X e Congr. 
geol. intern., Guide des Excursions, Mexico, no. XIV, 8 pp., 1 fig., 1906. 
1833. Oil in the State of Vera Cruz.— Min. and Sci. Press, vol. 95, pp. 247- 
248, 2 figs., August 24, 1907. 
Includes notes on the geology of the State. 
Analisis quimico de la cbiluca y de la cautera. — See Roel and Ordonez, no. 
2080. 
Oregon, University of. 
1834. In memory of Thomas Condon, Professor of Geology, 1876-1900.— 
Univ. of Oregon, Pull., new ser., vol. 4, no. 8, (54 pp., 3 pis. (port.), June, 1907. 
Oregon, University of, Department of Chemistry. 
The mineral resources and mineral industry of Oregon for 1903. — See St;if- 
ford, no. 2276. 
Orr, Ellison. 
1835. Exposures of Iowan and Kansan (?) drift, east of the usually ac- 
cepted west boundary line of the driftless area. — Iowa Acad. Sci., Proc, vol. 
14, pp. 231-236, 1 fig., 1907. 
Orton, Edward, jr. 
1836. The kaolin deposits of Bollinger County, Missouri. — Am. Ceramic Soc. 
Trans., vol. 9, pp. (52-94, 2 fius.. 1907. 
Orton, Edward, jr., and Peppel, Samuel Vernon. 
1837. The limestone resources and the lime industry in Ohio.— Ohio Geol. 
Survey, Fourth Ser., Pull. no. 4, 365 pp., 53 figs., 1906. 
Describes the composition and distribution by counties of limestones suitable for cement 
manufacture their occurrence and character by geological formations, and their utiliza- 
tion. 
