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Show KEEP AIR MOVING FOR A COOL HOME ; INWARMWEAfHER j Propeller Unit in Central I Plemt Also Maket for Eco- ( nomtcal Heating. Prof. Leonard Ersklne Hill, England's Eng-land's "grand old rinn of ventilation," is one of the scientffic authorises mm who have proved that . keeping the air tn the home constantly moving Is tve simplest and most effective way to make the bouts cool In summer, sum-mer, according to the Holland Institute Insti-tute of TherinolnKj of Holland, Mich. Besides being, a fellow , of University Univer-sity College, Lon don, and directing the department of I Prof. U I. Hill. applied physiology of the Brjtisb National Na-tional Institute of Medical Research, Professor Hill bears the titles M. B., F. R. S., Hon. A. R I. B. A. He Is the inventor of an Instrument called the "kata thermometer," used In air conditioning work, and author of no. merou books 'on medical and other scientific subjects. Professor Hill IS on of th scientists tn England, Germany snd the United States who have conducted ' tests showing the effects of air motion on human comfort In hot weather. In one of bis experiments, seven young men were shut up In a small airtight air-tight test chamber. Tbey went In laughing and chatting, but after some hours of confinement tbey became flushed, covered with perspiration and extremely restless and depressed. When the oxygen tn th atmosphere atmos-phere of the test room got so low that e match wouldn't born in it an electric fan was turned on. The tern perature end humidity remained tbe same and the carbon dioxide was not reduced But the test report says I 7 |