Sunday, May 19.

Appleton Chapel, 7.30 p. m. Rev. Alexander Mackennal, D.D., of Bowdoin, England. Rev. Paul Revere Frothingham will conduct morning prayers from May 20 to May 25. He may be found at Wadsworth House 1 daily from 9 till 11.

monday, May 20.

Seminary of American History. "The Annexation of California and New Mexico and the First Government." Mr. W. G. Leland. University 24, 3.30 p. m.

*Geological Conference. Paper: "Some of the Water problems of the West." (Illustrated by the Stereopticon.) Mr. Elwood Mead, of the United States Department of Agriculture. Geological Lecture Room, M. Z., 4.30 p.m.

Seminary of Economics. "Are the English Payments to Mall Steamships Subsidies?" Mr. W. E. Stilwell. University 23, 4.30 p. m.

Physical Colloquium. "A New Form of Spectroscope." Mr. Theodore Lyman.--"Recent Literature on Spectrum Analysis." Professor Trowbridge. Jefferson Physical Laboratory, 5 p. m.

Modern Language Conference. "Modern English Dramatists." Professor Baker. 49 Hawthorne t., 8 p.m.

Tuesday, May 21.

Faculty of Arts and Sciences. Meeting at University 5, 4 p. m.

*Legal and Economic Aspects of the Irrigation Problem. I. "The Nature of Titles to Water." Mr. Elwood Mead, of Washington, D. C. Geological Lecture Room, M. Z., 8 a. m.

Pierian Sodality. Spring Popular Concert. Soloist--P. L. Fish '01, Baritone. Sanders Theatre, 8 p. m. Admission by ticket only. Tickets, at 25 cents each, on sale at Sever's Bookstore.

Wednesday, May 22.

*Legal and Economic Aspects of the Irrigation Problem. II. "The Irrigation Laws of the Different Western States." Mr. Elwood Mead, of Washington, D. C. Geological Lecture Room, M. Z., 8 a. m.

*Exhibition of Pictures of the Intercollegiate Photographic Contest between Harvard and the University of Pennsylvania Camera Clubs begins today and extends through May 31. Randall Room, Brooks House, 10 a. m. to 9 p. m.

*Harvard Christian Association. Professor Palmer. Brooks House, 7 p. m.

*Harvard Mining Club. "The Industrial Importance of Metallography." Mr. Albert Sauveur. Rotch Building, 8 p. m.

Lecture. "Plays, Players, and 'Productions' of the Year." II. Mr. Copeland. Sever 11, 8 p. m.

*Seminary of Classical Philology. "On the a*** of the Greek Town House." Mr. A. H. Evans.--"Methods of Voting in the Athenian Courts." Mr. W. P. Woodman.--"Remarks on the variations in the tenses used by Verrius Flaccus, Festus, and Paulus Diaconus." Mr. D. Cameron. Harvard 3, 8 p. m.

Thursday, May 23.

*Legal and Economic Aspects of the Irrigation Problem. III "The Public or Private ownership of Streams." Mr. Elwood Mead, of Washington, D. C. Geological Lecture Room, M. Z., 8 a. m.

Friday, May 24.

*Legal and Economic Aspects of the Irrigation Problem. IV. "The Methods of Conserving the Public Water Supply." Mr. Elwood Mead, of Washington, D. C. Geological Lecture Room, M. Z.. 8 a. m.

Saturday, May 25.

*Legal and Economic Aspects of the Irrigation Problem. V. "State and National Aid for Irrigation." Mr. Elwood Mead, of Washington, D. C. Geological Lecture Room, M. Z., 8 a.m.

Appleton Chapel--Sunday Evenings.

May 26.--Rev. H. P. Dewey, of Brooklyn, N. Y.

June 2.--Rev. H. J. Heuser, of Overbrook, Pa.

June 9.--Rev. Robert MacDonald, of Brooklyn, N. Y.