HAND-BOOK OP WASHINGTON. Ill HOSPITAL FOR TIIE INSANE. Is situated very high on left bank of the Po tomac river, near the junction of the Eastern Branch. The site is a beautiful one, having a commanding view of the city and surrounding country. The design and specifications were made by Mr. T. U. Walter, and is in the collegiate style of Gothic architecture, very handsomely built of brick, presenting an imposing facade of seven hundred and eleven feet, divided into sections, each section receding from the center, and from each other, by which means it gives corridors in each section for the admission of light. The interior is conveniently arranged into wards adapted to the particular state of the patients. The central part of the building has buttresses on each corner, and tne main tower contains a magnificent oriel window. The windows sur rounding the building are ornamented with cast- iron hood mouldings. Attached to this institu tion is an extensive farm, highly cultivated; and around the building are beautiful lawns, groves, and walks, presenting quite an ornamental ap pearance. The whole of the grounds are en closed by a substantial brick wall.