RECENT PUBLICATIONS 581 
—Kartz, F. J. Abrasive Materials in t918. [U.S. Geological Survey, Mineral 
Resources of the United States, 1918. Part Il: 33. Washington, 1920.] 
—Kwnopr, ApotFr. A Geologic Reconnaissance of the Inyo Range and the 
Eastern Slope of the Sierra Nevada, California. With a section on the 
Stratigraphy of the Inyo Range, by Edwin Kirk. [U.S. Geological 
Survey, Professional Paper 110. 10918. Washington, ror9.| 
Geology and Ore Deposits of the Yerington District, Nevada. 
[U.S. Geological Survey, Professional Paper 114, 1918. Washington, | 
1919.| 
—LarsENn, E.S., anp Livineston, D.C. Geology of the Yellow Pine Cinnebar 
Mining District, Idaho. [U.S. Geological Survey, Bulletin 715-E. (Pre- 
pared in co-operation with the Idaho State Bureau of Mines and Geology.) 
Washington, 1920.| 
—LEFFINGWELL, E. pE K. The Canning River Region, Northern Alaska. 
[U.S. Geological Survey, Professional Paper 109. Washington, r1919.] 
—LeITH, C.K. International Control of Minerals. [U.S. Geological Survey, 
_ Mineral Resources of the United States, Part I: B. Washington, ror19.] 
—LesHerR, C. E. Coal in 1918. Part A. Production. [U.S. Geological 
Survey, Mineral Resources of the United States, 1918. Part II: 27. 
Washington, 1920.| 
—LINDGREN, WALDEMAR, AND LouGHIIN, G. F. Geology and Ore Deposits 
of the Tintic Mining District, Utah. With a Historical Review by V. C. 
Heikes. [U.S. Geological Survey, Professional Paper 107. Washington, 
1910.] 
—Liverpool Geological Society, Proceedings of the. Vol. XII, Part IV. 
Sessions the Fifty-Eighth, Fifty-Ninth, and Sixtieth, 1916-1919. [Liver- 
pool: Royal Institution, Colquitt Street, 1920.] 
—Liovp, E. R. Petroleum in 1018. [U.S. Geological Survey, Mineral 
; Resources of the United States, 1918. Part II: 32. Washington, 1920.] 
—Liovp, E. R., anp Martuer, K. F. Structure and Oil and Gas Resources 
of the Osage Reservation, Oklahoma. T.20N.,R.11 E. [U.S. Geologi- 
cal Survey, Bulletin 686-J. Washington, 1919.] 
—Loso, B. O Museu Nacional durante o Anno de 1919. [Museu Nacional 
do Rio de Janeiro. Rio de Janeiro, Imprensa Nacional, 1920.] 
—Lovucuiin, G. F. The Oxidized Zinc. Ores of Leadville, Colorado. [U.S. 
Geological Survey, Bulletin 681, 1918. Washington, 1919.] 
—McCasxkey, H.D. Quicksilver. [U.S. Geological Survey, Mineral Resour- 
ces of the United States, 1916. Part I: 24. Washington, r919.] 
—McLennan, J. C. Report on Some Sources of Helium in the British 
Empire. [Canada Department of Mines, No. 522. Mines Branch, 
Bulletin No. 31. Ottawa, 1920.] 
—DE Marceriz, Emm. Atlas établi sous la Direction de, Enquete sur les 
Richesses Minérales du Nord-Est de la France et des Régions voisines. 
[Paris, 1918.] 
