In a recent report on window glass substitutes, the Council on Physical Therapy of the American Medical Association1 presented the results of investigations which "encourage the belief that there are now available materials for glazing our windows which do not possess the fault of window glass in excluding the health-giving rays of sunlight." We present here a preliminary report on experiments that were started about a year ago. Our studies were designed to cast some light on the relations between seasonal variations in ultraviolet radiation from the sun and seasonal incidences of morbidity and mortality. In addition to obtaining, under the supervision of Prof. Henry G. Gale and Prof. A. J. Dempster, daily spectroscopic records of Chicago's sunlight and records on other meteorological conditions, we have obtained some data which may be of interest to readers of The Journal at this time.
In June, 1926, experiments were begun to
BUNDESEN HN, LEMON HB, FALK IS, COADE EN. ULTRAVIOLET RADIATION FROM SUNLIGHT AND INCANDESCENT LAMPS: ITS TRANSMISSION THROUGH WINDOW GLASS AND SUBSTITUTES. JAMA. 1927;89(3):187–189. doi:10.1001/jama.1927.02690030019007
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