Sunday, May 19.

**EVENING SERVICE. Rev. George A. Gordon, D.D., of Boston. Appleton Chapel, 7.30 P. M.

Monday, May 20.

SEMINARY OF ECONOMICS. "Municipal Ownership of Telephones in Great Britain," Mr. A. N. Holcombe. University 23, 4.30 P. M.

*PHYSICAL COLLOQUIUM. "A New Theory of Matter." Mr. P. A. Campbell. Jefferson Physical Laboratory, Room 25, 5 P. M.

SEMINARY OF AIMS AND METHODS OF PHILOSOPHICAL STUDY AND TEACHING. "The Preparation for the Doctor's Degree in Philosophy." Professor Royce. Emerson A, 7.30 P. M.

MODERN LANGUAGE CONFERENCE. "In Defence of "The Pearl.'" Professor Schofield. Common Room, Conant Hall, 8 P. M.

Tuesday, May 21.

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

*GEOLOGICAL CONFERENCE. "The Rocky Mountains of Montana." Professor Davis. "A Visible Fault in Colorado." Mr. R. W. Richards. Mineralogical Lecture Room, 8 P. M.

Wednesday, May 22.

*BOTANICAL CLUB. "Recent investigations on the Evolutionary History of the Pines." (Illustrated by the Stereopticon.) Professor Jeffrey. Nash Lecture Room, 4.45 P. M.

Thursday, May 23.

*LECTURE. "Alcaeus and Sappho." Professor Herbert Weir Smyth. Harvard 1, 4.30 P. M.

**ENGINEERING SOCIETY. "Power from Continuous Combustion under High Pressure." Professor Reeve. Pierce 110, 8 P. M.

Friday, May 24.

Last day for Juniors to make application to have degree taken in 1907 recorded "as of 1908" in the Quinquennial Catalogue. (See 1906-07 Catalogue, p. 391, foot-note.)

*ZOOLOGICAL CLUB. "Selection Experiments with Rats." Mr. W. G. Vinal.--"The Optic Apparatus in Teleosts." Mr. R. E. Sheldon. Zoological Laboratories, Fourth Floor, M. Z., Room 4, 4.45 P. M.

**DIVINITY SCHOOL. Sermon. Mr. A. Peterson. Divinity Hall, 7.30 P. M.