*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.