March 31, 1891. Special meeting.
Meeting held in the Law Lecture Room of Columbian University. Vice-President Ogden in the chair. Attendance, 300.
Mr. Sergius Stepniak delivered an address on "The Russian peasantry."
April 3, 1891. 51st meeting.
Meeting held in the Assembly Hall of the Cosmos Club, Vice-President Hayden in the chair. Attendance, 35.
A paper on "The Mackenzie river and Colinson," by Vice-President Greely, was read by title in the absence of the author.
Ensign J. A. Hoogewerff, U. S. N., presented an account of the "Magnetic work of the United States Naval Observatory." The paper was discussed by Messrs Baker, Abbe, Ogden, Hayden, and Hoogewerff.
Mr. F. H. Bigelow presented a paper on "Auroral streamers."
Mr. Cleveland Abbe made some remarks on "Theories of magnetic phenomena."
April 11, 1891. Special meeting.