This building is heated by steam, each room having four radiators placed under the same number of windows. The heat is thus supplied directly to the room, and the steampipes do not serve to warm a current of out-door air on its way through a flue to the apartment requiring it, as in the case of the Dudley School, next to be described. The fresh air enters as best it may; the foul air is supposed to be exhausted through a series of flues, of which each room has eight, with the usual top and bottom openings; these airshafts are made in the walls and the partitions, and therefore are much smaller than the box flues described in connection with the previous buildings. One of these airshafts ends in the attic on a level with the flooring, the foul-air escaping there; the other seven conduct to an enclosed space beneath the roof, made by ceiling all the rafters at their lower edges, so that each of the interspaces between these rafters becomes in effect another air-shaft leading to the ridge-pole. Two large ventilators afford the chance for the foul-air to escape from this peculiar and extensive receiver beneath the roof. It should be remarked that several extensive rents in this attic-ceiling, and, in particular, large openings immediately below each ventilator, exist, which must modify the theoretical usefulness of this plan of ventilation. The master of the school stated that the teachers used the windows for their supply of fresh air, placing no reliance on the eight brick flues.

The Lawrence School-house has fourteen rooms; the situation of the building is very satisfactory in a sanitary point of view. The date of its construction was 1856. The arrangement of the rooms and corridors is unobjectionable. The smoke-pipes of the boiler-fires in the basement pass upward through the corridors. The lower sash of many of the windows in the class-rooms is shielded at its bottom by a board which breaks the entering current of air.

The inspection was made on a still and cloudy day in

VI. Dudley School, Roxbury. - Inspected March 11.

Roxbury.—Inspected

TEMPERATURE.
(Fahrenheit)

VENTILATION.

29.99; the wind being north-east.

March, with the thermometer at 37°, and the barometer at

The Dudley School-house was built in 1874 from plans which were supposed to include the latest improvements in school-house architecture. The arrangement of the rooms, the corridors, the windows, and the scholars' desks is admirable. The heating agent is steam; each room has its own coil of pipes in the basement, under the supervision of the janitor, and its own flue for the fresh outer air which passes over the steam-coil before being delivered through the large register for the double purpose of warmth and respiration. The heating apparatus is unexceptionable on the score of health.

The window-sashes of the class-rooms are double, and both the outer and the inner sashes may be raised and lowered.

The arrangements for ventilation, although described, when the building was completed, as most excellent, present essentially the same features in principle as are to be found in nearly all the school-buildings, older or more modern, in the city. The fresh air is supplied over the steam-coil, or through the windows, as above indicated. The foul air istaken away through flues to the ventilating turrets upon the roof. But some improvement has been made with regard to these arrangements, as compared with the usual plan; the flues are of galvanized sheet-iron, instead of wood, and their registers are of good size, and are near the floor of the room at the side opposite the registers for the warm air. Each room has two foul-air flues. Most of the iron-tubes pass upward into the attic of the building, to enter a large central cupola or turret with louvred sides, through which the foul air is supposed to be drawn by the action of the wind. Six of the ventilating flues, three at each corner of one side of the building, have a disposition different from that just described. The plan, with reference to the outer flues of these six rooms of the building, was excellent; it was proposed that they should discharge into a brick shaft,

about five feet square, reaching from the basement to the roof, and surmounted by a turret, a coil of steam-pipe at the bottom giving the needed air-current upward. As a matter of fact, however, the design was only partially fulfilled. The brick flue is not surmounted by the turret, but opens into the attic of the building. The sheet-iron pipes, on their way to the turret, traverse the warmed flue, and may thus acquire some increase of temperature; but the original plan is not thereby fulfilled.

The water-closets, in the basement, are well ventilated by a flue arranged in connection with the smoke-flue of the fires beneath the boilers.

The spacious corridors of this building are of essential assistance in ventilating the class-rooms.

The scholars are of the better class.

The day on which the inspection was made was a bright, rather warm day in March, when the snow was melting, and there was little wind stirring. The thermometer stood at 36°; the barometer at 30.105.