330 RECENT PUBLICATIONS 
—LEE, WILLIS T. The Areal Geology of the Castle Rock Region, Col- 
orado. [From the American Geologist, Feb., 1902.] 
—MICHELSON, ALBERT A. The Velocity of Light. [The Decennial Publi- 
cation, University of Chicago Press, 1902. | 
—O’HaRA, CLEOPHAS. The Mineral Wealth of the Black Hills. [South 
Dakota School of Mines Bulletin No.6. Dep’t. of Geology. Rapid 
City, S. Dakota, 1902. ] 
—PENCK VON, ALBRECHT and RUCKNER, EDUARD. Die Alpen in Eiszeit- 
alter (mit mehreren vollbildern in autotypie, 2 farbigen profil-tafeln sowie 
zahlreichen text-illustrationen). [Gekrénte Preisschrift Lieferung 2. 
Chr. Herm. Tauchnitz, Leipsig, 1902.] . 
—R1GGs, ELMER S. The Fore Leg and Pectoral Girdle of Moroscaurus— 
with a note on the genus Camarosaurus. [Publication 63, Field Colum- 
bian Museum, Geol. series, Vol. I, No. 10, Chicago, 1go!.] 
The Dinosaur Beds of the Grand River Valley of Colorado. [Publication 
60, Geol. series, Vol. I, No. 9, 1g90!.] 
—WoopwortH, J. Backus. Pleistocene Geology of portions of Nassau 
County and Borough of Queens. [New York State Museum, Bull. 48, 
New York, tgo!.] 
—WaLcoTt, CHARLES D. Outlook of the Geologist in America. [Bulletin 
of the Geol. Soc. of Am, Vol. XIII, pp. 99-118, Rochester, Feb., 1902.] 
