Monday, February 13.

PRESIDENT AND FELLOWS OF HARVARD COLLEGE. Meeting at No. 50 State street, Boston, 10.30 A. M.

**SEMINARY OF ECONOMICS. Social Problems of American Farmers. President Kenyon L. Butterfield, of Rhode Island College of Agriculture. University 23, 4.30 P. M.

**ZOOLOGICAL CLUB. "The Function of the Spiracle of the Skate," Dr. H. W. Rand. Short Papers. Room 1, fourth floor, M. Z., 4.45 P. M.

PHYSICAL COLLOQUIUM. "The Electric Effect of a Rotating Dielectric in a Magnetic Field," Dr. Lyman. Jefferson Physical Laboratory, Room 25, 5 P. M.

CHAMBER CONCERT. Kneisel Quartet, assisted by Miss Hedwig Schroeder. Lecture Room of the Fogg Museum, 8 P. M. Program: Beethoven, Quartet in F major, op. 59, No. 1; Debussy, Andantino from Quartet in G minor, op. 10; Schumann, Quartet in E flat major, op. 47.