Monday, October 16.

*SEMINARY OF ECONOMICS. "The Principle of Self-interest." Professor Carver. Upper Dane, 4/30 P. M.

*PHYSICAL COLLOQUIUM. "Experiments on Sap Flow and Sap Presser." Dr. H. C. Hayes. Jefferson Physical Laboratory, Room 35, 5 P. M.

Tuesday, October 17.

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

GEOLOGICAL CONFERENCE. "Shoreline Changes in Northern and Southern Sweden." (Illustrated). Professor D. W. Johnson. "The Land-Slide of St. Alban, Quebec." Professor Palache. Mineralogical lecture Room, University Museum, 8 P. M.

Thursday, October 19.

**LECTURE. "The Montessori Schools at Rome. I. Dr. Montessori and the Beginnings of the System." Professor A. O. Norton. Emerson J, 4.30 P. M.

*ZOOLOGICAL CLUB. "Some Results from the Study of Whales." Professor Willy Kuekenthal. Zoological Laboratory, 4th floor, Room 4, 4.45 P. M.

BOSTON SYMPHONY ORCHESTRA CONCERT. Soloist: Mr. Rudolph Ganz. Sanders Theatre, 8 P. M. Program: Beethoven, Overture to Goethe's "Egmont"; Tschaikowsky, Symphony in B minor, No. 6, "Pathetic"; Liszt, Concerto for Pianoforte, A major; Liszt Symphonic Poem "Tasso Lamento e Trionfo."

Friday, October 20

RECEPTION BY THE ADMINISTRATIVE BOARD OF THE DENTAL SCHOOL to the Teaching Staff and Members of the School. Professors Theobald Smith and Frank B. Mallory will speak on "The Value of Research." Dental School Building, Longwood avenue, Boston, 8 P. M.

PHILOSOPHICAL CLUB. "A Theory of the Nature and Significance of Conscience." Mr. C. J. Ducasse. Emerson C, 8 P. M.

Saturday, October 21

Last day in the half-year upon which Undergraduates, Special Students, and Unclassified Students in Harvard College may drop courses of study without liability for additional course fees.