366 Sloan's Architectural Review and Builders' Journal. [Dec., safe, and at the same time effectual and economical, means of warming large buildings ; and consists of cast-iron boilers, made in sections, and the proper amount of heat regulated by three dampers, which again are operated upon by the expansion of the water, at the different temperatures. The radiating surface is of cast-iron. " In order to insure the most perfect ventilation possible, a double disc venti- lating fan will be used, 8 feet in diame- ter, and driven by steam-power. This fan is capable of discharging from 7o,000 to 100,000 cubic feet of air per minute ; and the air duct from it will be connected into all the radiator chambers, so that, in winter, the air is heated pre- vious to its discharge into other rooms. The foul air in the building will be forced down through flues (one to each cell and room) into a horizontal underground duct opening into an annular space, around the main boiler flue, where it is rarified and discharged. This method, combining natural and forced ventila- tion, is now universally adopted in the best-appointed modern public buildings; more especially in hospitals and gaols, where plenty of fresh air must be con- tinually furnished, throughout the entire 3'ear, to absorb and carry off the noi- some effluvia and vapors arising from diseased and negligent inmates. The ventilating and heatino; of cells and corridors is performed by the same process. The cool fresh air from with- out is brought into the building, and passing over the steam-heaters is trans- mitted through the corridors. The fan and the draught in the smoke-stack are connected with flues extending into the cells, two to each, one at the bottom and one at the top. By the operation of the fan and the draught of the smoke-stack, the air in the cell is drawn out, and the warm air of the corridors passes into the cell to supply its place, therelrv intro- ducing fresh air. In all other respects, the most per- fect and complete disposition has been made for the internal arrangements and convenience of the inmates ; nothing has been left undone that could be de- vised for the comfort and the proper furnishing of the building in the wa}' of bath-tubs, wash-tubs, water-closets and wash-basins, sinks, ranges, and plumbing and gas-fitting in general. In short, the wishes of the Commissioners of the County seem to have been most fully and ably carried out by Mr. Mc Arthur and his assistants, Messrs. William S. Andrews, and Reuben W. Peterson, in the erection of a building, destined to remain for ages and to meet the require- ments of a very large aud ever increas- ing population. TWIN CITY DWELLINGS, Style: Tudor-Gothic. IN the preceding number of our Re- view, we gave a description and illustration of two adjoining City Dwell- ings in the Italian style. We now pre- sent our readers with the same plan and arrangement, having a front in the Tu- dor-Gothic. This design is for a four-story eleva- tion, with Basement and Attic, as the former. The principal difference will, of course, be in the Entrance Porch and the Win- dows, which features are distinctly de- fined in the accompanying design. There is something very domestic in the character of this elevation of twin- houses, which, taken together, make such a very pleasing front ; yet, taken singly, would be far from agreeable. The Porch is composed of two front
