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III 
CONTENTS. 
JANUARY NUMBER. 
Thomas Steny Hunt. [Portrait] Persifor Frazer. ... 1 
Man and the Grlacial Period. R. D. Salisbury 13 
Frondescent Hematite. [Plates Hand III.] N.H.Winchell 20 
On Pleistocene Changes of Level in Eastern North Amer- 
ica. Baron De Geer 22 
Editorial Comment. — The Unit of Mapping for State Surveys, 44. The 
Topographical work of the National Geological Survey, 47. 
Review of Recent Geological Literature. — The Volcanic rocks of South 
Mountain in Pennsylvania and Maryland, Geo. H. Williams, 55. 
— A contribution to the Geology of the Great Plains, Robert Hay, 
56. — On the Structure and Age of the Stockbridge Limestone In 
Vermont, T. Nelson Dale, 57. — Supposed Interglacial shell beds 
in Shropshire, England, G. Frederick Wright, 57.— Geology of 
the Pribilof Islands, Joseph Stanley-Brown, 57. — The Gulf of 
Mexico as a Measure of Isostasy, W J McGee, 58. — The Iroquois 
Shore North of the Adirondacks, J. W. Spencer, 58. — Channels 
over divides not evidence j9cr se of glacial lakes, J. W. Spencer, 
58. — Notes on the Geology of the Yukon basin, C. Willard Hayes, 
58. — Relationship of the Glacial lakes Warren, Algonquin, Iroquois 
and Hudson-Champlain, Warren Upham, 59. — Secondary banding 
in gneiss, Wm. H. Hobbs, 59. — Proceedings of the Fourth annual 
meeting, G. S. A., held at Columbus, O., Dec. 29, 30 and 31, 1891, 
H. L. Fairchild, Sec, 60.— Elementary Geology, Charles Bird, 
60. — North American Geology and Paleontology, S. A. Miller, 60. 
— Gems and Precious stones, KuNz; A little more light on the U. 
S. Geol. Survey, Marcou, 60. - Handbook of Physical Geology, A. 
J. Jukes-Browne, 61. 
Correspondence. — The Higginsville Sheet of the Missouri Survey, Ar- 
thur WiNSLOw, 61. — The Topographical work of the National Geo- 
logical Survey, Robt. T. Hill, 64; Henry Gannett, 65. 
Personal and Seientific News. — The Michigan Geological Survey; Gen- 
eral Drayson, on the cause of the Glacial Period; Wisconsin 
Academy of Sciences, Arts and Letters, 68. 
FEBRUARY NUMBER. 
Notes on a farther study of the pre-Cretaceous rocks of the 
California coast ranges. [Plate IV.] Harold W. 
Fairbanks 69 
Lake Filling in the Adirondack region. C. H. Smyth, Jr. 85 
The Magnesian Series of the Ozark uplift. Frank L. Nason. 01 
Second Supplement to Mapoteca Geologica Americana, 1752- 
1881. Jules Marcou 95 
15 Si-s^ 
