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It is intended to show, by the illustration here presented, a simple, cheap, but effective, method for reducing the temperature and collecting dust in sick-rooms, crowded factory workshops, tenement houses, etc., during the summer in large cities, which may also be adapted to residences in tropical countries.
Various methods have been in vogue for cooling purposes in large buildings by the use of ammonia and brine coils, but they are very expensive to instal, often costing thousands of dollars, and are heavy and cumbersome. There are other possible objections to be urged against the refrigerator method. For instance, all windows in the rooms must be kept closed, and for this reason, in the subtraction of moisture from the atmosphere, there is a possibility that with the condensation of the aqueous vapor in the form of frost on the coils other necessary normal constituents of the atmosphere are extracted and withdrawn at the same time. Too great a chill may be produced in contrast to the hot weather and high temperature elsewhere existing outside the building in which the ammonia system has been installed, with, of course, disastrous results, so far as health is concerned, to employees or occupants of the building on emerging into the heated atmosphere from the cooler air, or the rapid cooling of a perspiring body on sudden, incautious entrance into a chilled room.
MANNING WJ. A WATER-CURTAIN FOR COOLING ROOMSPRACTICAL FOR CROWDED WORKROOMS, FACTORIES, HOSPITAL WARDS, TENEMENT HOUSES, AND FOR COLLECTING DUST. JAMA. 1910;LIV(23):1848–1849. doi:10.1001/jama.1910.92550490006002b
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