VI Go7itents^ 
MAY NUMBER. 
riiK Pleistocene Geology oe the Concannon Farm, near Lan- 
sing, Kansas. N. H. Winchdl. [Plate XV-XVIIL] 263 
Note on Titaniferous Pyroxene. Alexander N. Winchcll 309 
Basin-Range Structitke in the Death Valley Region of 
Southeastern California. M. R. Caiufbell 311 
Editorial Comment. 
How long ' ago was America peopled? 312 
Review of Recent Geological Liticrature. 
Schmalensecia amphionura en ny trilobit-typ. /. C. Moberg, 316 
The Glacial Geology of New Jersey. R. P. Salisbury 316 
Monthly Author's Catalogue of American Geological Liter- 
ature 319 
Personal and Scientific News. 
Geological Survey of Washington, 325 ; Am. Phil. Society. 
325 ; The Tctrahedral Theory, 325 ; Elephant, Bison and Man 
in Eastern Washington, 323; Mining in Colorado, 326; Har- 
vard Summer School scholarships, 326; Ellsworth Huntington, 326 
JUNE NUMBER. 
John Wesley Powell. Geo. P. Merrill . [Portrait.] 327 
The Richmond Group along the western side of the Cincin- 
nati Anticline in Indiana and Kentucky. -lug. P. 
Pocrste. [Plates XX-XXH.] 3.1^ 
An old Platte Channel. G. E. Condra. [illustrated.] 361 
Relative Age of the Lance Creek (Ceratops) Beds of Con- 
verse Co., Wyoming, the Judith River Beds of Montana 
and the Belly River Beds of Canada. /. B. Hatcher. ... 369 
The Determination of the Feldspars in Thin Section. /. E. 
St^urr 376 
Review of Recent Geological Literature. 
The cause of the Glacial Period, being a Resume and Discus- 
sion of the Current Theories to account for the Phenomena 
of the Drift, with a New Theory by the Author. H. L. True. 384 
E.xistence du Crctace inferieur en argolidt Grece — Existence 
du Jurassique sup. et de i'infra-cretace dans I'isk de Crete. 
etc., etc. L. Caycnx 386 
Monthly Author's Catalogue of American Geological Liter- 
ature * 386 
Correspondence. 
The Rock Name Aiiorthosyte. Carl Pred Koldcrup 393 
Personal and Scientific News. 
Proposed Topographical Map of Micliigan, 395 ; New Mexico 
School of Mines, 395 ; Department of Geology of t'he Univer- 
sity of Wisconsin, 396; United States Geological Survey. 396; 
American Institute Mining Engineers, 397; Wisconsin Geolog- 
ical Survey, 397; International Congress of Geologists, 398; 
National Academy of Sciences 39S 
