The Station Houses of the city are so arranged as to be central to their respective precincts. The new buildings are models of their kind, and the old ones are being improved as rapidly as possible. Perhaps the best arranged, the handsomest, and most convenient, is that of the Fourth Precinct, located at No. 9 Oak street. The locality is one of the worst in the city, and it is necessary that the police accommodations should be perfect. The building is of red brick, with a fine white granite facade, with massive stone steps leading from the street to the main entrance. The entrance leads directly to the main room, or office. On the right of the entrance is the Sergeant's desk, of black walnut, massive and handsomely carved. Back of this is a fine book-case of the same material, for the record books and papers of the station. The telegraph instrument is at the side farthest from the windows--a precaution looking to its safety in case of a riot or attack on the station. Speaking-tubes, and boxes for papers, communicate with the other apartments. The walls are adorned with fine photographs of the late Superintendent Jourdan, the present Superintendent Kelso, and the Police Commissioners. Back of the office is the Surgeon's Room, with every convenience for the performance of the Surgeon's duties. The office of the Captain in command of the station is to the left of the entrance, and is fitted up with a Brussels carpet, and black walnut furniture. The walls are covered with fine engravings and photographs of prominent men. The Captain is also provided with a bed-room, bathroom, etc., which are elegantly furnished. The Sergeants' bedrooms are large, airy, and well furnished. Bathrooms for the Sergeants and Patrolmen are located in the basement. The sleeping rooms of the Sergeants and Roundsmen, and four large dormitories for the Patrolmen, are situated on the second and third floors. Each Patrolman has a private closet for his clothing, etc., and each bedstead is stamped with the occupant's section number. The fourth story is used for store-rooms. On the first floor there is also a large sitting-room for the Patrolmen. Attached to the Station House, and connected with it by a bridge, is the prison, a brick building three stories in height. It is entered through the Patrolmen's sitting-room, and is the largest in any city station house. It contains fifty-two cells, all of which are of a good size and are well ventilated. Four of these (Nos. 1, 16, 17, 32) are somewhat larger than the others, and are humorously called by the force "Bridal chambers." They are reserved for the more respectable prisoners. Over the prison are two large rooms designed for the unfortunates who seek a night's shelter at the station--one for men and the other for women. They are provided with board platforms to sleep on. These platforms can be removed, and the whole place drenched with water from hydrants conveniently located.