FACULTY OF ARTS AND SCIENCES. Meeting at University 5, 4 P. M.

*LECTURES. "Geology of Fuels, Fluxes, and Refractory Materials." VI. Mr. Louis C. Graton. Rotch Building, 12 M.

*LECTURE. "Libraries of Colonial New York and Boston." (Illustrated by Lantern Slides.) Dr. Austin Baxter Keep. Robinson Hall, 5 P. M.

*BOSTON SOCIETY OF MEDICAL SCIENCES. Amphitheatre of Building C, Medical School, Longwood avenue, Boston, 4.30 P. M. Open to members of the University and of the medical profession.

Wednesday, March 16.

*LECTURE. "The Principles of Immunology and their Applicability to Diagnosis and Therapy." V. Dr. F. P. Gay. Lecture Room, Building E, Medical School, Longwood avenue, Boston, 3 P. M. Open to members of the University and to physicians.

**CERCLE FRANCAIS LECTURES. "Contingence at Liberte." V. M. Emile Boutroux. Emerson D, 4.30 P. M.

**HARVARD BOTANICAL CLUB. "The Ecology of Mosses." Professor L. W. Riddle. Room 11, 2nd floor, University Museum, 4.45 P. M.

**THE SPEAKERS' CLUB. Readings. Mr. George Riddle. New Lecture Hall, 8 P. M. Open to all students of the University, and to officers of the University and their families.

Thursday, March 17.

*SUPPLEMENTARY LECTURE IN MATHEMATICS H. "Mortality Tables and Life Insurance." Professor J. L. Coolidge. Sever 24, 10 A. M.

*LECTURE. "The Principles of Immunology and their Applicability to Diagnosis and Therapy." VI. Dr. F. P. Gay. Lecture Room, Building E, Medical School, Longwood avenue, Boston, 3 P. M. Open to members of the University and to physicians.

**CERCLE FRANCAIS LECTURES. III. "L'essence de la religion." M. Emile Boutroux. New Lecture Hall, 4 P. M.

*ZOOLOGICAL CLUB. "The Introduction of a European Bark-beetle, Scolytus Multistriatus, into Massachusetts." Mr. J. W. Chapman. Zoological Laboratory, 4th floor, Room 4, 4.45 P. M.