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Show Pittsburgh Students Test Intensity of Soiled ' Two Pittsburgh students of air set up an ingenious devic. records the intensity of ultra-: or short wave, solar radiation New York Sun. Attached to ti strunient is a meter on which ' draws a punctuated, curved across a check-ruled pne F day for a whole year such a r,' i was taken on the roof of a bup in Pittsburgh; the report nn - u collection of 305 samples of s 11 handwriting has just been i Examining the (lay-by-day stnn Pittsburgh's share In the sims'. i--of ultraviolet rays, H. B. Meiiw' r' scribes the loss of radiation b , L ter months, on days of over ' skies. "Sorriest of all recording-says, recording-says, "were those on mornings, man-made smoke became B. with fog and mantled the inuV-cities." inuV-cities." ' " |