Having established playgrounds, women seek to maintain some supervision over them. They are advocating the use of playgrounds as evening social centers. They are asking for medical inspection and corrective exercises in the playgrounds. They are asking for experimentation in teaching in the playgrounds. They are inculcating ideas of good government among the children. Inasmuch as in great cities like New York and Chicago there never can be enough playgrounds on the street level to meet the needs of the children, there is a decided movement in such municipalities toward the transformation of roofs into playgrounds. The Parks and Playgrounds Association of New York, directed by both men and women, has already opened several of these roof playgrounds and the influence is being felt in various constructive ways. Private owners of apartment houses are beginning to supply these facilities for young tenants as an inducement to mothers to rent homes with them. Schemes for aerial playgrounds over the streets on platforms are being proposed also. Another very practical scheme for playgrounds is the provision of certain streets for play, traffic being shut off from them during definite hours of the day. A systematic plan is being made of New York by the present administration to ascertain to what degree this scheme can be extended and in this work two lines of interest, in which women are very active, converge: recreation and safety. Frances Perkins and other women have stimulated interest in public safety to a marked degree in New York. DANCE HALLS Since the love of dancing persists without abatement through the centuries, dancing must be accepted as a human need. Dancing should not, however, cause the ruin of young men and women. That would seem to be a trite remark but it has apparently taken infinite pains in investigatory and publicity work to persuade the public or any considerable portion of it that unregulated modern dance halls do injure their patrons and that they must be reformed. The trail out from the home, when followed by women in urban centers, has led them in almost every case to the dance hall. Health workers, W. C. T. U. women, welfare workers, social workers, educators, propagandists of all kinds have found in the public dance hall their Waterloo. The number of policewomen in the cities now assigned to these places to safeguard young girls is a direct response to the demands made by women that such municipal provision be made for their care.