Open to the public.

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

Geological Conference. Paper: A proposed Sea Trip to South America. Mr. R. De C. Ward.- The Crystallization of Calcite. Dr. C. Palache. Geological Laboratory, Room 2, M. Z., 7.45 p. m.

Open to all members of the University.

Harvard Camera Club. Exhibition of Photographs. Sever 9, 10 a. m. to 10 p. m.

Open to the public.

19. Wednesday.Psychological Colloquium. Reports and Discussion of Researches. Psychological Laboratory, 1.30 p. m.

Open to all members of the University and of Radcliffe College.

20. Thursday.Engineering Conference. The Development of Electricity by Water Power. Mr. W. Partridge. Lawrence Scientific School, Room 7, 4.30 p. m.

Open to all members of the University.

21. Friday.Divinity School. Preaching Service. Mr. H. White. Divinity Chapel, 7.30 p. m.

Open to the public.