sj \J '^ t. O ■ . 
CONTENTS. 
JANUARY NUMBER. 
Pagk 
Joseph Francis James. G. K. Gilbert. [Portrait, 
Plate I.] 1 
The Determination of the Feldspars. N. H. Winchkll. 
[Plates II-VIII.] 12 
The Pittsburg Coal Bed. I. C. White 49 
Revieiv of Recent Geological Literature. — Seventeenth annual leport 
of the United States Geological Survey, Chas. D. Walcott, Di- 
rector, 61. — Iowa Geological Survey, vol. 6, Annual Report, 1896, 
with accompanying papers, S. Calvin, State Geologist, 64.— Vol- 
canoes of North America: a reading lesson for students of Geog- 
raphy and Geology, Israel C. Russell, 65.— Beitrage zur Kennt- 
niss einiger paleozoischer Faunen Sud-Amerikas, von Herrn E. 
Kayser, 66. — Petrology for students. An introduction to the study 
of rocks under the microscope, Alfred Barker, 67. -Geological 
section from Moscow to Siberia and return, Persifor Frazer, 68. 
Monthly Authors^ Catalogue of American Geological Literature, 68. 
Correspondence. — The mechanical action of the Divining-Rod, M. E. 
Wadsworth, 69. 
Personal and Scientific News. — New York Academy of Sciences, 72.— 
A new meteorite, 73.— Cuvier prize, 74.— Iowa Academy of Scien- 
ces, 74. 
FEBRUARY NUMBER. 
Additional Note on the Oceanic Current in the' Utica 
Epoch. R. RuEDEMANN. [Plate IX.] 75 
Shell-Bearing Drift on Moel Tryfan. Warren Upham... 81 
Cote Sans Dessein and Grand Tower. C. F. Marbut. 
[Plate X.] 86 
The Geology of the Keweenawan Area in Northeastern 
Minnesota. A. H. Elftman. [Plate XI.] 90 
An Account of the Researches relating to the Great Lakes. 
J. W. Spencer 110 
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