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The building is located on a lot of land bounded on three of its sides by D, Fifth, and Gold streets, the principal front facing on D Street. The building is three stories high exclusive of the basement and attic, the main building having a frontage on D Street of 90 ft. 4 in., and on Fifth and Gold streets 61 ft. 8 in. In the centre of the D-street and rear sides is an avant corps, or projection from the main building, each projecting 7 ft. 4 in. and having a width of 34 ft. The entrances to the building, of which there are two, one in front, the other in the rear, are in the projections. The entrance hall extends across the building from front to rear and is 22 ft. wide in the centre of the building, a staircase and scholars' cloak-rooms occupying a portion of the width at each end of the hall.

On each side of the entrance hall, in each of the three stories, are two school-rooms, each 29 by 32 ft. and 12 ft. 6 in. high. Each of these rooms, twelve in all, has its separate cloak-room for scholars, each about 5 by 17 ft., connecting both with hall and school-room, and a small room for the teacher, 6 by 10 ft., connecting with the schoolroom. The teachers' rooms are located in the angles of the projections, a broad and well lighted staircase occupying the middle portion at each end of the halls. In the attic, the whole of the main building within the high Mansard roof, is devoted to a hall about 54 by 80 ft. and 16 ft. high, for exhibitions and general exercises; in the projections are the staircases and closets for apparatus, &c. The large hall is lighted from all sides, and the whole floor space is clear of obstructions, a handsome stucco cornice finishes the angle of the walls and ceiling, and the walls, which are entirely vertical, are sinished about 4 ft. high with hard wood. It is larger than any uther school-house hall in the city.

The basement is 10 ft. high in the clear, 5 ft. of which is above the level of the yard paving. In this story is a Committee room about 17 by 30 ft., a janitor's room, teachers' water closets, the heating apparatus and fuel room, and two play-rooms for scholars, each 29 by 32 ft.

Each school-room is furnished with 56 single desks and chairs, a seacher's platform, desk, chair, and waste-basket, a clock and thermometer, blackboards on two sides of each room, with neat recep"acles for chalk at the bottom, and cases within the thickness of the partition walls for containing chalk and other necessary articles.

Each school-room is lighted by four large windows, which are proided with inside blinds with rolling slats, for regulating the quantity of light. All the school-rooms and the large hall åre in communiLation with the head master's room by means of bells and speaking tubes.

In the corridor of each story are two enamelled iron sinks supplied with Cochituate water. The teachers' closets in the basement are fitted with wash-bowls and water-closets. The school privies are



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located in the rear of the yard, and are approached by a covered and screened passage from the rear entrance of the building.

All the standing wood work is of a beautiful brown ash wood. The wood is gummed to fill the grain and then oiled.

The building is heated by a low pressure steam heating apparatus. There are two tubular wrought-iron steam boilers in the basement, which may be worked conjointly or separately. One is supposed to be sufficient for all ordinary winter weather. There are in the basement connected with these boilers, twenty-six stacks of steam radiators, each in a separate air-chamber. Each school-room is connected with two of these hot air-chambers by means of tin pipes and registers located on its two weather sides. The hall is also connected with two of a large size. Cold out-door air is conveyed by means of ventiducts to cach hot air-chamber where it is moderately warmed by being strained through the stack of radiators [sce accompanying cut] and thence passed to the school-rooms. The radiators are of cast-iron; the whole number of them is four hundred, with aggregate of four thousand fect of radiating surface.

The pressure of steam on the boilers suficient for heating purposes varies from three to five pounds to the square inch. As fast as the steam is condensed, it is returned to the boilers in the form of warm water, and hence, it is only at intervals of two or three weeks, that it is necessary to replenish the boilers with cold water.

The plan of ventilation is in some respects different from that in any other school building in the city. Each school-room is provided with a separatc ventiduct 16 by 16 inches in the clear, constructed of smoothly plancd boards, with two valves opening into it, one near the floor and the other near the ceiling. These valves are about 16 by 24 inches. The lower one is to be kept open for ordinary ventilation; the upper one is designed to be opened when there is surplus heat to be expelled. The ventiducts, although connected to the rooms by the valves just described, are located in the several clothesrooms, and are extended up into the roof; from thence the foul air escapes through one large ejector placed at the highest point of the roof. To further assist in the ventilation of the school-rooms, cloakrooms and halls, swivel blinds are placed over all the doors, and movable glazed sashes are inserted in the partitions on the hall side of the cloak-rooms, so that a full and free discharge of air from the school-rooms may be effectual without a draught, the air passing out of the school-rooms rises up through the well-rooms of the staircases, and through openings in the attic ceiling to the ejector on the roof.

All of the walls and partitions are constructed with bricks, the exterior walls are faced with pressed bricks. The trimmings of the doors and windows, the basement up to the level of the first floor, the belt course at the height of the second floor, and the tablet over the front entrance, on which is the name of the school and the date of erection in bold raised letters and figures, are all of white Con

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