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We have examined with unusual interest a copy of an article which Dr. Henry Mitchell Smith read before the Brooklyn Medical Society. Dr. Smith calls attention anew to the radical error in the arrangements for heating in common use to-day, namely, the absence of provision for supplying moisture needed in the air. He declares that in heating buildings we have failed to appreciate the full importance of the fact that our sensations of temperature depend not on the heat that is received from outside sources, but on the rapidity with which the body heat is lost. Radiation from the body is much more rapid when the air is lacking in moisture. To supply this moisture is a measure both hygienic and economic. On the latter point of view he quotes an authority as saying that "25 per cent. of the cost of heating is expended in raising the temperature from
INDOOR HUMIDITY.. JAMA. 1904;XLIII(21):1557. doi:10.1001/jama.1904.02500210047013