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 2.

11.00.--Morning Service in Appleton Chapel by the Reverend Elwood Worcester, Rector of Emmanuel Church, Boston.

4.00.--Medical School Lecture, XVIII, "Sex, Differences in the Human Brain" by Dr. E. E. Southard, the Medical School, Longwood avenue, Boston.

Monday, May 3.

2.30.--Start of the University and Freshman tennis tournament on Jarvis Field.

2.30.--CRIMSON Editors' baseball team vs. candidates on Soldiers Field.

3.30.--Meeting of Romance seminary in Upper Warren.

4.00.--Letter Cup series, team 13 vs. 14, and team 4 vs. 5, on Soldiers Field.

4.30.--Lecture of Seminary of Economics, "The Boston & Maine Reorganization," by Professor Ripley in Upper Dane.

5.00.--Physical Colloquium, "X-Ray Wave Lengths," by Mr. F. L. Hunt in Jefferson Physical Laboratory, Room 5.

5.00.--University fencing championships in Hemenway Gymnasium.

8.00.--Modern Language Conference, "Walter Map: De Nugis Curialium," by Mr. James Hinton, and "The Medieval Legend of Judas Iscariot," by Mr. P. T. Baum, in Conant Common Room.

Tuesday, May 4.

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

4.00.--University baseball team vs. Colby on Soldiers Field.

4.00.--Team 9 vs. 10, and 14 vs. 15 in Leiter cup series.

4.00.--Second baseball team vs. Tufts seconds on Soldiers Field.

4.30.--Southworth Lectures. III. "The Beginings of National Churches," by the Reverend Ambrose White Vernon, minister of the Harvard Church, Brookline, in Room A of the Andover Seminary Building.

Wednesday, May 5.

3.00.--1918 baseball team vs. Groton at Groton.

4.00.--Team 1 vs. 3, and 6 vs. 8 in Leiter cup series on Soldiers Field.

4.45.--Chemical Colloquium. "The Fixation of Atmospheric Nitrogen and its Application to the Metallurgy of Steel," by Professor J. E. Bucher, of Brown University, in Coolidge Memorial Laboratory.

7.00.--St. Paul's Society Meeting in Noble Room of Phillips Brooks House; address by Mr. T. Takamatsu of Episcopal Theological School on "Christianity in the Far East."

8.00.--Address before Mathematical Club by Dr. Edward Kircher, of Massachusetts Institute of Technology in Conant Common Room.

Thursday, May 6.

4.00.--Class crew races.

4.00.--University baseball team vs. University of Vermont on Soldiers Field.

4.00.--Second baseball team vs. Pilgrims on Soldiers Field.

4.00.--Team 11 vs. 13, and 2 vs. 4 in the Leiter cup series on Soldiers Field.

4.30.--Southworth Lecture. IV. "The Beginnings of the Free Churches," by the Reverend Dr. Vernon, in Room A of Andover Seminary Building.

Friday, May 7.

4.00.--Team 7 vs. 9, and 12 vs. 14, in Leiter cup series on Soldiers Field.

4.55.--Lecture of Zoological Club, "The Amphibia of Maine," by Mr. P. H. Pope in Zoological Laboratory, Room 46.

8.00.--Lecture on "Stress-strain Diagrams in Steel," by Mr. A. P. Gradolph, in Conant Common Room.

8.00.--1918 debating teams compete in triangular Yale, Harvard, Princeton Freshman Debate on "Resolved, That the United States should abolish the Monroe Doctrine as part of its foreign policy": Negative vs. Yale at New Haven; affirmative vs. Princeton in New Lecture Hall.

Saturday, May 8.

3.00.--University baseball team vs. Holy Cross at Worcester.

3.00.--1918 baseball team vs. Huntington High School on Soldiers Field.

3.00.--Second baseball team vs. Worcester Academy at Worcester.

3.00.--Dual track meet with Cornell in Stadium.

3.00.--1918 dual track meet with Exeter at Exeter.

3.00.--University tennis team vs. Dartmouth on Jarvis Field.

3.00.--University golf team vs. Rhode Island State team at Providence.

4.00.--Team 3 vs. 5, and 8 vs. 10 in Leiter cup series on Soldiers Field.

8.00.--Concert of University Musical Clubs in City Hall, Portland, Me.