The first story will be sixteen feet from floor to floor. This is to be the Lecture Room. The second story will be twenty-five feet at the walls, and thirty-nine feet to the apex of the ceiling in the centre. The Gallery will be six feet wide along the sides, circular on front, and the ends curved at the rear. Its floor will be level. [Illustration: FIG. 2.] Besides the Lecture Room, the first floor will contain two class rooms and the ladies’ parlor. Immediately over the Lecture Room, and of the same size, will be the Sunday-school Rooms. And over the ladies’ parlor there will be the Infant School. On the gallery are three class rooms on the front, two of which are over the Infant School Room, and one over the eastern stairway. There are two class rooms in the rear. The walls will be of rubble masonry. As high as the level of the first floor, and projecting two inches, with a wash, the exterior will be hammer-dressed. Above that, the superstructure will be all laid broken range, pointed off, except the rear wall, which will be rubble with rock face. The whole will be faced with Trenton Brown Stone. All the dressings of the doors, windows, buttress, caps, cornices, pinnacle caps, etc., will be distinguished by a finer class of work. The roof and its dormers will be covered with best Blue Mountain slate, of medium size, varied with green and red color. The interior as well as exterior finish will be Gothic in style, inexpensive yet expressive. FIG. 1. The plan of the Lecture Room is here shown: A, A, the entrances, with stairs in each, leading to School Rooms and continuing to Gallery. B, Ladies’ Parlor. C, the Lecture Room. D, Platform and desk. E, E, Class-Rooms. F, F, Water-Closets. FIG. 2. This is the arrangement of the Second story, which contains: G, the Infant School Room. H, the School Room. J, J, Class Rooms. K, K, Water Closets. Fig. 3. L, L, L, the Gallery. M, M, M, Class Rooms in front. M, M, Class Rooms in rear. It will be seen that, by means of sliding glass partitions, each floor can be considerably enlarged in accommodation. There are nine class-rooms, and school room for over six hundred children. The galleries will hold two hundred and fifty. The illustration below that of Calvary, is the design of the TRINITY REFORMED CHURCH, now being erected on the east side of Seventh street, south of Oxford street, in this city. It is also Gothic in style, and although smaller than that just described, will, nevertheless, be a very convenient and tasteful church, and well suited to the wants of its growing congregation. [Illustration: FIG. 3.] HYATT’S VAULT LIGHTS.