550 RECENT PUBLICATIONS 
Sections and Thickness of the Lower Silurian Formations on West Canada 
Creek in the Mohawk Valley. 15th Ann. Report State Geologist, 
New York. 
—SCHROEDER, H. Wissenschaftlicher Bericht zu Blatt Greiffenberg Schwedt 
Mohrin. Berlin, 1897. Eine grosse Fehs-Art and Markischem. Berlin, 
1897. 
—SCHROEDER, H. and C. A. TEUNE. Endmordanen in der nordlichen Ucker- 
mark und Vorpommern. Berlin, 1894. 
University Geological Survey of Kansas, Vol. 1V. Palzeontology, Part I. 
S. W. Williston, Paleontologist. Lawrence, 1898. 
University uf Wisconsin. Agricultural Experiment Station. Bull. No. 68. 
One Year's Work done by a 16-foot Geared Windmill. Madison, June 
1898. 
—WHITE, Davip. Omphalophloios, A New Lepidodendroif Type. Bull. 
Geol. Soc. Am., Vol. IX, pp. 329-342. 
—WHITE, DAvID and CHARLES SCHUCHERT. Cretaceous Series of the 
West Coast of Greenland. Bull. Geol. Soc. Am., Vol. 1X, pp. 343-368. 
Rochester, June 1808. 
WapswortTH, M. E. Report of the Michigan Mining School for 1898. 
Some Methods of Determining the Positive or Negative Character of 
Mineral Plates in Converging Polarized Light with Petrographical 
Miscroscope. Am. Geologist, Vol. XXI, March 1898. 
The Origin and Mode of Occurrence of the Lake Superior Copper 
Deposits. Trans. Am. Inst. of Mining Engineers, Lake Superior 
Meeting, July 1897. 
Correspondence. The Mechanical Action of the Divining Rod. Am. 
Geologist, Vol. XCI, January 1898. 
Some Statistics of Engineering Education. 
The Michigan College of Mines. 
The Elective System in Engineering Colleges. Proc. of the Society for 
the Promotion of Engineering Education. Buffalo Meeting, 1896. 
The Elective System in Technological Schools. /ézd. 
