The English women also suggest the desirability of a central heating plant as a measure that would lessen the work of the household, afford economies in fuel, and render a hot-water supply readily available. They urge, therefore, further experimentation with central heating. The American plans have no suggestions to make at this point, but accept the coal stove or the separate furnace in the higher-priced houses as the means of heating. While they provide for hot water, no suggestions are made as to how this is to be supplied. It is presumably done by a tank attached to the range, which means that hot water is not available when there is no fire in the range; that is, in summer and during the night. It should also be noted that these plans make no suggestions for co-operative use of any of the equipment of the household. There is another point at which the architects and builders failed to take sufficient notice of the problem of lightening the women's work--namely, in their attitude toward the separate family home as compared with the multiple family dwelling. The Massachusetts Commission was, by the terms of the Act creating it, limited to the provision of one or two-family houses; the United States government standards were definitely against the building occupied in whole or in part by three or more families. Tenement and apartment houses are considered generally undesirable, and will be accepted only in cities where, because of high land values, it is clearly demonstrated that single and two-family houses cannot be economically provided, or where there is insistent demand for this type of multiple housing. This judgment, however, has by no means met with universal approval. Those architects who think in terms of the woman's time and strength consider the merits of the group and of the multiple house. For example, those who planned the Black Rock Apartment House Group in Bridgeport, Connecticut, the open-stairway dwellings, the John Jay dwellings on East Seventy-seventh Street, New York City, and the Erwin, Tennessee, development, maintain that the advantages of the separate house in privacy, independence, and access to land can be secured by the multiple arrangement. Not only can economies in the use of the land be practiced, but protection and assistance for the women and children can be obtained, and there is the possibility of devices for convenient and collective performance of many tasks.