The house of A. T. Stewart & Co. is the best known to persons visiting the city. Indeed there are very few Americans who have not heard of and longed to visit "Stewart's." It is, besides, the largest and most complete establishment of its kind in the world. It occupies the entire block bounded by Broadway, Fourth avenue, Ninth and Tenth streets. The principal front is on Broadway, and the public entrances are on that street and on the Fourth avenue. The Ninth street entrances are reserved exclusively for the employes of the house. Many persons speak of the edifice as a "marble palace," but this is incorrect. It is constructed of iron, in the style of arcade upon arcade, and its fronts are so thickly studded with windows that they may be said to consist almost entirely of glass. It is five stories in height above the street, and above the fifth story there is an interior attic not visible from the sidewalk. Below the street there is a basement and a sub-cellar, so that the monster building is really eight stories in height. There is no attempt at outward display, the fine effect of the edifice being due to its vast size and its symmetry. The interior is as simple. The floors are uncarpeted, the shelves are plain, as are the counters and the customers' seats. The centre of the building is occupied by a large rotunda extending from the ground floor to the roof. All the upper floors are open around this rotunda. Two flights of massive stairs lead to the upper floors, and there are three handsome elevators for the use of customers who do not care to make the journey on foot. Three other elevators on the Ninth street side are used for carrying goods. Each of the floors covers an area of about two acres, so that the whole establishment, including the cellar, occupies sixteen acres of space. The cellar contains coal bins with a capacity of 500 tons. Close by are eight Harrison boilers of fifty horse power each, used for operating the steam engines and warming the building with steam. There are in all ten steam engines located in this immense cellar. These are used for running the elevators, for working seven steam pumps, for feeding the boilers, and for forcing water up to the top floor, which is used as a laundry. In a certain part of the cellar is located the electrical battery, by means of which the gas jets in the building are lighted. Here are also rooms for the storage of goods.