Osborn Hall, which is being erected on the Yale campus, to be used exclusively for recitation rooms, is fast nearing completion, and when finished will be one of the finest buildings belonging to the college, as well as the best equipped building of the kind in the country. The interior finish is almost entirely oak, the hall way and rooms being finished of that work. The instructors' desks of polished oak are all in position and the students' seats are being fast put in. Particular attention has been paid to the heating and ventilation of the building, some new apparatus being made in this direction. The temperature in each room is regulated by dampers worked by compressed air, which in turn are governed by electricity, so that the temperature is controlled automatically and kept constant. A large blower in the basement delivers air to the different rooms at the rate of 24,000 cubic feet a minute, and is the amount this air is heated which determines the temperature. In this way there is a constant current of fresh air passing through the rooms, and yet their temperature remains unchanged. All that has to be done is to set an index at the required temperature, and everything is done automatically. The heating is done by steam from the boilers back of AlumniHall and circulated by two lowpressure engines. The rooms are to be frescoed in warm cream and reddisb-brown tints which will give them a very handsome appearance and add materially to their comfort. In every way the building is to be as near perfection as it can possible be made.