ENGLISH 72.- The next report on Chatterton, with especial reference to the Rowley poems, will be due Monday, May 17.

C. T. COPELAND.GEOLOGY 1 AND 3.- Excursion to Blue Hill Observatory.- The first excursion to Blue Hill Observatory will be made this (Wednesday) afternoon. Train for Readville leaves Park Square station at 1.18 p. m. The Observatory will be reached about 2.30. Those who intend to make the trip on bicycles should be at the top of Blue Hill by that time. Should it be necessary to postpone this excursion on account of rain, announcement of the fact will be made at the regular lecture hour on Wednesday.

R. DEC. WARD.ENGINEERING 13A and 13B.- Meet this (Wednesday) afternoon at the Watertown arsenal at 2 p. m., to see the operation of the Emery testing machine.

LIONEL S. MARKS.THE Harvard College Observatory will be open to the Class of 1897 from eight to ten o'clock on the evenings of May 11, 12 and 13.

EDWARD C. PICKERING, Director.