All notices for the weekly CRIMSON Calendar must be placed in the notice box in the CRIMSON Office on Fridays before 5 o'clock, marked "For the CRIMSON Calendar."

Sunday, May 18.

11.00.--**Morning service in Appleton Chapel. Rev. Professor E. S. Ames.

4.00.--**Medical School Lecture. "Future Lines of Investigation of Infectious Diseases," by Dr. S. B. Wolbach. Medical School, Longwood avenue, Boston.

Monday, May 19.

8.15.--*Morning prayers.

3.00.--*College doubles tennis tournament begins.

4.30.--*Seminary of Economics. "Industrial Workers of the World." Mr. E. M. Kayden. Upper Dane.

5.00.--*Physical Colloquium. "Recent Theories of the Solid State." Dr. Bridgman. Jefferson Physical Laboratory, Room 25.

8.00.--Modern Language Conference. Speaker: Professor Kittredge. Election of officers, Common Room, Conant Hall.

Tuesday, May 20.

8.45.--*Morning prayers.

2.30.--*College golf championships begin.

4.00.--Faculty of Arts and Sciences. Meeting at University 5.

8.00.--*Economist Society and Socialist Club. Meeting in Trophy Room of Union. Subject for dissuasion: "Socialism." Refreshments.