The hall on the first floor terminates at one end of the house in the living-room, and at the other end in the dining-room, economizing space. The living-room has windows on three sides, and has an attractive fireplace. The dining-room at the opposite end of the cottage has also windows on three sides. The kitchen is so arranged as to give cross ventilation, both east and west and north and south, in hot weather. The first floor has also a small sewing room, with suitable storage. On the second floor there are two dormitories, each containing 10 beds. Each dormitory is connected with shower bath, toilet, and locker room, so arranged that the day clothing of the boys is locked up at night. The second floor contains a commodious room for the matron, with bath and a room for a monitor. [Illustration: RECEPTION COTTAGE--FIRST FLOOR PLAN] [Illustration: RECEPTION COTTAGE--SECOND FLOOR PLAN] The arrangement of the cottage is such that there is not an inch of waste space and its appearance outside and inside is very attractive. The building is thoroughly well constructed, with excellent hardwood floors which are maintained in perfect condition after five years’ use. The Hawthorne School has developed by the process of evolution, which has produced four types of cottages, each new one presenting improvements upon its predecessors. It illustrates the advantage of building institutions by successive steps in order to profit by experience. One-Story Cottage at the Thorn Hill School (for Delinquent Boys) _By_ HASTINGS H. HART The Thorn Hill School is an institution for delinquent boys maintained by Allegheny County, Pennsylvania, and located at Thorn Hill, 20 miles north of Pittsburgh. When the school was instituted, in 1911, on the advice of the writer, two wooden shacks, without basements, with a capacity of 24 boys each, were built for temporary use. These buildings were well constructed, with floors of southern pine and were ceiled with southern pine, and equipped with good plumbing. [Illustration: ONE-STORY COTTAGE--FLOOR PLAN] Soon after some excellent two-story brick cottages of modern construction were built. The superintendent said to one of the house fathers: “You have done so well in this temporary cottage that we intend to give you one of the new cottages.” The house father replied that he and his wife would prefer to remain in the one-story cottage. This preference led to a study which resulted in the construction of three one-story brick cottages, two of which had a small basement under a part of the building, and the other had no excavation. The first two one-story cottages were planned by Mr. T. E. Billquist, architect, and have been in satisfactory use for a number of years.