Open to persons interested in theoretical biology.

Seminary in Economics. Georgia's Experiment in State Railway Management. Mr. G. Walcott. University 23, 430 p. m. Seminary of American History and Institutions. The Exploration of Coronado.

Mr. George P. Winship. University 20, 4.30p.m.

Semitic Conference. Sever7.15 p. m. Lecture. Macaulay. Mr. E. Charlton Black Sever 11, 7.30 p. m. Open to the public.

2. TUESDAY.Last day for receiving applications for College Rooms for 1803-94.

Seminary of Classical Philology. Certain Forms of Future Supposition in Herodotus. Mr. C. B. Stetson.-Themistocles in Athens in 462 B. C. Mr. E. D. Marsh. Sever 13. 2.30p.m.

Open to all students in Greek and Latin courses.

Mathematical Seminary. Double surfaces. Mr. H. L. Coar. University 19, 3.30 p. m.

The lecture will be followed by a discussion of problems to be announced on the bulletin board.

Open to all members of the University. Illustrated Lecture. Babylonian before the time of Hammurabi (4000-2300 B. C.). Professor D. G. Lyon. Boylston Hall, 7.30 p.m.

The public are invited. Geological Conference. Mr. R. A. Daly, "Secular Disintegration of Rocks" (postponed from last week); Mr. L.S. Griswold, "On some Triassic Sections"; Mr. H. L. Harris, "A comparison of soil conditions in glaciated and non-glaciated regions." Geological Laboratory, 7.45 p. m.

3. WEDNESDAY.Lecture. Principles of Historical Criticism. Aids to the Study of History. Professor Ephraim Emerton. Harvard 1, 4.30 p. m.

Open to the public. Teachers and persons intending to become teachers are especially invited.