April 14. The Country House. Mr. R. S. Peabody.

April 21. The Construction of the Parthenon. Professor H. L. Warren.

These lectures will be open to the public.

Exhibition of Photographs.The first exhibition of the Gardner Collection of Photographs (maintained by the income of a fund given in 1892 by George A. Gardner, Esq. of Boston) will be made by the Department of Geology and Geography in Massachusetts Lower Hall, from Wednesday to Saturday, March 25 to 28 inclusive. The Hall will be open each day from 2 p. m. to 6 p. m., and from 7.30 p. m. to 9.30 p. m., also on Saturday, from 10 a. m. to 1 p. m.

Officers of the Department will be present to point out views of special interest and to answer inquiries.

Geological Excursions, Spring of 1896.A series of general excursions will be conducted by officers of the Departments of Geology and Geography, and of Mineralogy and Petrography, during the months of April and May; in these excursions instructors and students in the Geological Departments of other New England Colleges (for men) are cordially invited to participate. The excursions from Cambridge are under the immediate supervision of Mr. T. A. Jagger, Jr., who is prepared to give information as to travelling expenses, etc., from 9 to 10 a. m., Mondays, Tuesdays, and Wednesdays, Room 6, Museum of Zoology, or at the Geological Conference on Tuesday evenings. On or before the Wednesday preceding each excursion, members of Harvard University may purchase special railroad tickets from Mr. Jaggar at mileage rates. The books relating to the principal points of interest visited in these excursions will be found on the table specially reserved in Room 2, Museum of Zoology.

The following list is provisional and subject to change; details about trains, etc., will be announced in the Calendar from week to week, and postponement in any case will be announced before noon Friday on the Bulletin in University Hall.

Saturday, April 4, 1896. Excursion to Monadnock Mountaln, N. H., conducted by Mr. J. B. Woodworth.

Saturday, April 11, 1896. Excursion to New Haven, Conn., in charge of Professor H. S. Williams, of Yale College.

April recess, April 17-25, 1896. Excursion to the Middle Susquehanna district, Pa., in charge of Professor W. M. Davis. Object: Study of the deflected tributaries of the Susquehanna (see Rivers and valleys of Pa., Nat. Geogr. Mag., I, 1889, 241-243).

Saturday, May 2, 1896. Excursion to Conanicut Island, R. I., conducted by Professor J. E. Wolff.

Saturday, May 9, 1896. Excursion to Cape Ann, conducted by Professor N. S. Shaler.

Saturday, May 16, to Monday, May 18, 1896. Excursion to Provincetown, Mass., in charge of Professor W. M. Davis.

Saturday, May 23, 1896. Excursion to Mt. Tobey and Bernardston, in charge of Professor B. K. Emerson, of Amherst College.