BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-190*7. 121 
Lawson, Andrew C— Continued. 
1527. The geomorphic features of the middle Kern [California].— California 
Univ., Dept. Geol., Bull*., vol. 4. no. 16, pp. 397-409, 4 pis.. 1906. 
Describes physiographic features of the region and considers their explanation. 
1528. The geoinorphogeny of the Tehachapi Valley system [California]. — 
California Univ., Dept. Geol., Bull., vol. 4, no. 1!). pp. 431-462, 10 pis.. 1906. 
Describes physical characters and drainage of valleys in the southern part of the 
Sierra Nevada, the geologic formations of the surrounding mountains, and the geologic 
history of the region. 
1529. Tehaehapi Valley. — Abstract : Geol. Soe. America, Bull., vol. 17, p. 729, 
1907. 
1530. Methods of igneous intrusion. — Abstract: Science, new ser., vol, 25, 
pp. G22-623, April 10, 1907. 
Lawson, Andrew C, and others. 
1531. Preliminary report of the [California] State earthquake investigation 
commission. [1906], 20 pp. Reprinted in Min. and Sei. Press, vol. 1)2. no. 24. 
pp. 399-401, 4 figs., June 16, 1000; Science, new ser., vol. 2.*5. pp. 961-967, .June 2!). 
1!)<><; ; Sei. Am. Snppl.. vol. 01, no. 1590, pp. 2."4S2-2r>4S4. June 2.*;, 1906; Nature, 
vol. 74, pp. 285-286, July 19, 1906; Scottish Geog. Mag., vol. 22. pp. VS.', 430, 1906. 
Includes various data relating to the geologic structure of the State of California 
and to the earthquake of April 18, 1900. 
Lawson, Pnblins V | irgilins|. 
1532. Story of the rocks and minerals of Wisconsin. Appleton, Wisconsin, 
Press of the Post Publishing Company [1906]. 202 pp., illus. 
Leach, W. W. 
1533. The Telkwa mining district. B. C. — Canada, GeoL Survey, Sumni. 
Kept, tor 1906, pp. 35-42, 1900: British Columbia, Ann. Kept. Minister of Mines, 
for 11)0(), pp. 93-100, 11)07. 
Gives notes on the general geology and on the occurrence and character of coal ami 
ore deposits. 
1534. The Telkwa River and vicinity. B. C. — Canada, Geol. Survey. 1907, 
23 pp. and addenda 8 pp., 1 map. 
Includes an account of the geology and the occurrence of coal. 
1535. Some notes on the economic geology of the Skeena River [British 
Columbia]. — Canadian Min. Jour., vol. 28, no. 4 (new ser.. vol. 1. no. 2), pp. 58 
00. April 1. 1007. 
(Jives an account of the geology and the occurrence of coal, gold, and other mineral 
resources. 
Le Conte, Joseph X. 
1536. The Evolution group of peaks. —Sierra Club Bull., vol. r>, no. •"», pp. 
229-237, :; pis.. L905. 
Describes the physiographic features of iliis section of the Sierra Nevada Mountains of 
California. 
1537. The motion of the Nisqually glacier. Mt. Rainier, V. S. A. Zeits.hr. 
f. Gletcherkunde, Bd. 1, Heft .">, pp. 192-199, 4 tigs.. 1906; Sierra Club Bull., 
vol. 0. no. 2, pp. 108-114, 3 pis., January. 1907. 
Describes the location, character, and pate of movement of the glacier. 
Lee, Harry K. 
1538. Pyrites and marcasites.— Mineral Collector, vol. 13, no. 1. pp. 1-2. 
March. 1906. 
Gives notes upon the occurrence of these minerals in (astern New .terser and upon 
their characters. 
