BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 127 
Log'an, \V. N., and Perkins, W. R. 
1610. The underground waters of Mississippi.— Mississippi Agric. Exp. Sta- 
tion, Bull. no. 89, 112 pp., 23 figs., January, 1905. 
Lombard, Warren R.. and D'Ooge, Martin L. 
1611. Israel Cook Russell. — Science, new ser., vol. 24, pp. 426-431, October 
5, 1906 
A sketch of his life. 
Loomis, Frederic B. 
1612. Wasatch and Wind River primates. — Am. Jour. Sci., 4th ser., vol. 21, 
pp. 277-285, 8 figs., April, 1906. 
Discusses characters and relationships, and gives descriptions of various species. 
1613. A fossil bird from the Wasatch.— Am. Jour. Sci., 4th ser., vol. 22, 
PP. 481-482, 3 tigs., December, 1906. 
1614. Wasatch and Wind River rodents.— Am. Jour. Sci., 4th ser., vol. 23, 
pp. 123-130, 7 figs., February, 1907. 
Characterizes several new species of Paramys and one new specif of Sciuravus. 
1615. Origin of the Wasatch deposits. — Am. Jour. Sci., 4th ser., vol. 23, 
pp. 356-364, 3 figs., May, 1907. 
From a study of the character of the fauna and the lithologic characters of the geo- 
logic section concludes that the Wasatch beds of Wyoming are of flood-plain origin. 
Describes two new species of vertebrates from these beds. 
Lord, 1M win C. E. 
1616. Examination and classification of rocks for road building, including 
the physical properties of rocks with reference to their mineral composition 
and structure.— U. S. Dept. Agric., Office of Public Roads. Bull. no. 31. 29 pp.. 
10 pis., 1907. 
Loring, Frank C. 
1617. Cobalt | Ontario |.— Min. and Sci. Press, vol. 95, pp. S14-815, 2 figs., 
December 28, 1907. 
Includes notes on the geology and the occurrence of the silver ores. 
Louderback, George Davis. 
1618. Study of the basin range structure and glaucophane and associated 
schists of California and Oregon.— Carnegie Inst, of Washington, Yearb. no. 4. 
1905, p. 191, L906. 
1619. The relation of radioactivity to vulcanism. — Jour. Geology, vol. II. 
no. 8, pp. 747-7.T7, 1906. 
Discusses the bearing of the radioactivity shown to be present in igneous rocks upon 
certain problems of geology, and more particularly its inadequacy to explain the phe- 
nomena of volcanism. 
1620. Benitoite, a new California gem mineral, with chemical analysis by 
Walter C. Blasdale.— California Univ., Dept. Geol., Bull. vol. 5, no. 9', pp. 149- 
153, July. 1907. 
1621. Where mammoths roved. Recent discoveries in ('arson. Nevada. State 
prison- footprints that made geologists wonder theory of their human 
brigin. — Sunset Magazine, vol. 19, no. .",. pp. 205 210, ilius., July, 1907. 
Louis, Henry. 
1622. What is a fissure vein?— Econ. Geology, vol. 1, no. 5, pp. l^l 484, L906. 
Low, Alfred Peter. 
1623. Report on the Dominion Governmenl Expedition to Hudson Bay and 
the Arctic Islands on hoard the I >. <J. S. Neptune. 1903 1904. Ottawa, Govern- 
nient Printing Bureau, 1906. 355 pp.. illus. 
Includes a summary of the geology of (be northeastern oasis of America and reports 
by Lambe ami Ami on the fossils collected. 
