PLANS AND DESCRIPTIONS OF UNION SCHOOL HOUSE, YPSILANTI, MICHIGAN. HIS edifice stands in the center of a beautiful square in the central part of the cityof Ypsilanti, one of the most attractive, healthy and flourishing towns in the Stat of Michigan. The building has a transept of 120 feet and a depth through the tansept of 95 feet, and through the end compartments of 68 feet. The first story of the building which is 20 feet high in the clear, contains a large room, 90 by 45 feet, used for public exercises, chapel, &c., four primary school rooms, with necestry clothes rooms, and two main transverse corridors, running entirely throug the building, each 12 feet wide. The large room is a clear and uninterrupted pace, without column or pillar of any kind to intercept the view.

The second story contains one class room 45 by 41 feet--two other class rooms, ach 41 by 22 feet, four recitation rooms, library, apparatus room and necessat clothes room. In this story the main corridor, 8 feet wide, runs longitudinally through the building, lighted at each end by a triplet window.

The thred story contains one class room 45 by 41 feet, one do. 35 1-2 by 281-2 feet, two p. each 45 by 22 feet, three recitation rooms, suit of rooms for janitor's residence, clothes rooms, corridors, &c., the latter being arranged as in the second stry. The second and third stories are each 16 feet high in the clear. The first ry is raised 6 feet above the level of lot, leaving a lofty basement story undewhich will be occupied by heating apparatus, storage and fuel rooms. The elevion is designed in the Italian style of architecture, and can be sufficiently undetood by the accompanying engraving. The quoins in the corners, the window nd door caps and sills, the cornice, the architave mouldings, belt courses, &c.,re finished in imitation of brown free stone, the remainder of the work being ohand pressed brick.

There are seral advantages claimed in the plan of this Union School. In the first place e large room or chapel is placed in the first, instead of as is usual, in the th or upper story. This is infinitely more convenient and safe, than it is to reque an entire congregation at commencement or other exercises, to climb up to thtop of a high building. It is also more desirable, as the infant children can be ten into the room on all occasions, without danger to them, which in ordinaryases, tutors are afraid to do. In this plan it will be seen that the infant childrehave access to their school room by side doors, independent of the main halls Vich are used by the older scholars, also a very desirable arrangement. The Gre separation of the sexes in the access to, and egress from, the school is secure and yet by the interior arrangement of the rooms they can unite when requireduring their studies, and separate again to their respective class rooms without fusion or inconvenience. Constructively also it has several advantages. Requiri strong interior walls, there is ample opportunity for carrying up the warm airnd ventilating flues in them, instead of in outside walls, thereby securing morsure and constant action of the air in the flues, both injecting and ejecting, removing all doubt as to their proper action. The doors to all rooms are me with a swinging panel over the transom, so that in the warm weather, by ohing these, and the windows of balls and rooms, a constant change of air is ged. The exterior walls are all hollow and plastered into the brick work. Theaircases are wide and easy to ascend, giving ample opportunity to discharge tentire number of scholars in a few seconds of time. The plans have been orated, matured and carried out, by Messrs. Jordan & Anderson of Detroit, Migan.