12 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 
Adams, Frank D., and others. 
13. Report of a special committee on the correlation of the pre-Cambrian 
rocks of the Adirondack Mountains, the " original Laurentian area " of Canada, 
and eastern Ontario. — Jour. Geology, vol. 15, no. 3, pp. 191-217, 1907. 
Describes the geology along the route traveled by the committee in New York and 
Canada, and discusses the correlation of pre-Cambrian rocks. 
Aguilera, Jose G. 
14. Resume of the progress of geology in Mexico. — Min. World, vol. 25, 
no. 11, pp. 292-295, September 15, 1906. 
15. Excursion de Mexico a Tehuacan. — X e Congr. geol. intern., Guide des 
Excursions, Mexico, no. IV, 17 pp., 1906. 
Gives notes on the geology of the country between these places. 
16. Excursion de Tehuacan a Zapotitlan et San Juan Raya [Mexico]. — X e 
Congr. geol. intern., Guide des Excursions, Mexico, no. VII, 27 pp., 1 geol. map, 
1906. 
Describes the geology of the country between these places. 
17. Les gisements carboniferes de Coahuila [Mexico]. — X e Congr. geol. 
intern., Guide des Excursions, Mexico, no. XXVII, 17 pp., 1 pi., 1 fig., 1906. 
Describes the geology of the region. 
18. Apergu sur la geologie du Mexique pour servir d'explication a la carte 
geologique de l'Ainerique du Nord. — Congr. geol. intern., C. R. 10 e sess., Mexico, 
1906, pp. 227-248, 1907. 
Gives an outline of the stratigraphy of Mexico. 
19. Les volcans du Mexique dans leurs relations avec le relief et la tectonique 
generale du pays. — Congr. geol. intern., C. R. 10 e sess., Mexico, 1906, pp. 1155- 
1168, 1 pi., 1907. 
20. Los volcanes de Mexico en sus relaciones con el relieve y la tectonica 
general del pais. — Mexico, Secretaria de Foinento, Bol., 2 a epoca, ano 6, VI, 
no. 8, pp. 121-129, 131-139, 1 pi., 1907. 
Discusses the relations between the volcanoes of Mexico and the general relief and 
geologic structure of the country. 
Aitken, Frank W., and Hilton, Edward. 
21. A history of the earthquake and fire in San Francisco. An account of 
the disaster of April 18, 1906, and its immediate results. San Francisco, The 
Edward Hilton Co., 1906. 285 pp., illus. 
Alcala, Maximino. 
22. Sondeos en las lagunas 6 cienegas de Almoloya y Lerma. — Soc. Geol. 
Mexicana, Bol. t. 2, pp. 15-34, 1906. 
Describes investigations upon pent resources. Includes notes on the local geology. 
Alden, William C. . 
23. Description of the Milwaukee quadrangle, Wisconsin. — U. S. Geol. Sur- 
vey,. Geol. Atlas of IJ. S., folio no. 140, 12 pp., 9 figs., 2 maps, 1 illustrations 
sheet, 1906. 
Describes the topography, the occurrence, character, and relations of Ordovician, 
Silurian, and Devonian formations, and of glacial deposits, the geologic history, and the 
economic geology. 
Aldrich, Thomas H. 
24. A new fossil Busy con (Ful(jur) from Florida. — Nautilus, vol. 20, no. 11, 
p. 121, 1 pi., March, 1907. 
25. Some new Eocene fossils from Alabama. — Nautilus, vol. 21, no. 1, pp. 8-11, 
1 pi., May, 1907. 
