Sunday, January 21.

APPLETON CHAPEL, 7.30 P. M. Rt. Rev. Thomas A. Jaggar, D.D., of Boston. Rt. Rev. Thomas A. Jaggar, D.D., will conduct morning prayers from January 22 to January 27. He may be found at Wadsworth House 1 daily from 9 till 11 A. M.

RECEPTION. Professor and Mrs. Ostwald and the Misses Ostwald will receive their friends in Phillips Brooks House from 4.30 to 6.30 P. M. As no special invitations have been issued, Professor and Mrs. Ostwald ask all the friends whom they have met during their stay in Cambridge to consider this announcement as a personal invitation.

Monday, January 22.

**PHYSICAL COLLOQUIUM. "The Equipartition of Energy," Professor Hall. "The Energy of X-rays," Dr. G. W. Pierce, Jefferson Physical Laboratory, Room 25, 5 P. M.

Tuesday, January 28.

**FACULTY OF ARTS AND SCIENCES. Meeting at University 5, 4 P. M. La Sociedad Espanola. "Porto Rico," Mr. G. Rivera, Harvard Union, 8 P. M.

Wednesday, January 24.

**ZOOLOGICAL CLUB. "Review of the Report by A. Agassiz on the Expedition of the 'Albatross' to the East Pacific," Mr. H. B. Bigelow. Short Papers, Room 1, fifth floor, Z. M., 4.45 P. M.

Thursday, January 25.

MID-YEAR EXAMINATIONS under the Faculty of Arts and Sciences begin today and end on February 10.

*VESPER SERVICE. Appleton Chapel, 5 P. M.

Friday, January 26.

UNIVERSITY TEA. Phillips Brooks House, 4 to 6 P. M. All members of the University are cordially invited.