The building is planned after the palace of the Tuilleries, having at each end the chateau roof and mansard windows. It is 500 feet long, and 170 deep. The only drawback to its architectural effect is the entrance, which should have been a magnificent double stairway, but is, for the present, only an ordinary private door. This building stands in the midst of two hundred acres of lovely sloping and swelling land. To the right, and quite visible at the porter's lodge, is the gymnasium and hippodrome under one roof; to the left, the graceful observatory, which is also the home of Miss Mitchell and her father. In the two wings of the building with chateau roofs are five private dwellings, rented for a moderate sum to the resident professors. In the centre, just behind the entrance, are the dining-hall, the chapel, the art-gallery, and the library; also the large drawing-rooms, where pupils and teachers receive their friends, and the parlor and office of president and principal. Connecting this centre with each wing, on four floors, run long corridors with sunshine and bright windows on one side, and clusters of students' rooms and recitation-rooms on the other. The rooms are in pretty groups of four. Three bedrooms open into one study, the latter made pleasant and home-like by the united treasures of the occupants. The music-rooms are "deadened," so that the noise hardly strays beyond the walls; and the cabinet, where the students in natural history prepare specimens, is full of cases to preserve the work. The best that I can say of the building will hardly do justice to the intention of the founder, which no one can comprehend who has seen only such institutions as Harvard and Yale. There is no occasion here to wish for any thing which may perhaps come when the college is rich enough. Mr. Vassar's intention was and is to have the endowment perfect. The building is fire-proof, every partition wall being of solid brick. There are four pairs of fire-walls, into which iron doors run on rollers; and between these are fire-proof stairways, always safe, even if the wood work should catch fire. There is the physiological cabinet, with every thing for the use of the professor, including various manikins and wax preparations. The library, chiefly of books of reference, holds three thousand volumes, to be increased at the rate of five hundred per annum, and is also used as a reading-room, where newspapers and reviews may always be found. The art-gallery, purchased at an extra cost of $20,000, is such as no college in the country possesses. It consists of good copies in oil, fine water-colors, including six real Turners, large portfolios of original sketches, and a perfect library of works on art and engravings,--in all, about a thousand volumes. Besides the five hundred pictures, this gallery contains a few busts and casts; among them, Palmer's Sappho in marble, an ancient wrought brazen shield, and specimens of ancient stained glass.