550 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Mr. H. A. Hazen made a communication on The Brocken 
Spectre. 
Published in Science, vol. 14, p. 224, September 27, 1889. 
Mr. W J McGee made a communication on The Southern 
Extension of the Columbian Formation. 
Published in abstract in Proceedings of the American Associa¬ 
tion for the Advancement of Science, vol. 39, p. 244, 1890. 
346th Meeting. January 18, 1890. 
President Dutton in the chair. 
Fifty members present. 
The President announced the death of Professor J. H. C. 
Coffin, who was one of the founders of the Society, and died 
January 8, 1890. 
The two standing subcommittees for 1890 were then an¬ 
nounced as follows: 
On Communications: 
T. C. Mendenhall. 
C. V. Riley. 
G. B. Goode. 
On Publications: 
Robert Fletcher. 
W. C. WlNLOCK. 
Marcus Baker. 
Hon. Edwin Willets made a communication on The Scientific 
Work of the Department of Agriculture. 
Published as a special report, 4 included in the Report of the 
Secretary of Agriculture for 1890, pp. 59-73. 
Mr. J. P. Iddings read a paper on The Relation Between the 
Mineral Composition and Geologic Occurrence of Certain Igne¬ 
ous Rocks of the Yellowstone National Park. 
Published in this volume, pp. 191-220. 
