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Show I KEEP HOME AIR MOVING AND INCREASE WORKING EFFICIENCY pulse rate as the best Indicator of the severity of discomfort under hot weather condition. Similar result have been obtained from studies made by the British National Institute of Medical Research, the Holland Institute Insti-tute states. This principle of air motion is made available for the average home by a oew type of electrified propeller unit installed In a warm Modern air conditioning science makes It possible for employer to Increase both the comfort and the efficiency of their workers by simple sim-ple and Inexpensive methods, declares de-clares the Holland Institute of Ther-mology Ther-mology of Holland, Mich. And the same methods can be used to change the ordinary warm air circulating heating plant Into a year-round air conditioning plant that will make the home comfortable lo summer as well as In winter. VBM MNf W IWWWM 991 I I I I I I I I I I I I I I I I I I I JBOT -ouaM r --- -4- I I j 1 -- - v I5.S"4wOwiWfl'Hlr j jT'Jji " " 1 z ; Sj 3 a J J 1 - -" :::::: W': :::::::::: : :ltpl: -;;::::::::::: ;: flt loo no lio lie- DRY SUU nM.IKATURI Keep the air In the factory, office or home moving steadily at moderate velocity Instead of allowing it to remain re-main stagnant that's the principle by which effective cooling can be Introduced In-troduced without complicated refrigerating re-frigerating or debumldlfylng machinery, machin-ery, according to the ventilating experts ex-perts of the Holland Institute. Air motion tests recently conducted at the Pittsburgh research laboratories laborator-ies of the U. 8. Bureau of Mines and the American Society of Heating and Ventilating Engineers showed how the application of this principle increases in-creases working efficiency. First, men were put to work In the test chambers with the air normally still and stagnant Then this air of the same temperature and with the same relative humidity was blown past the workers at a velocity of 890 feet All the men tested were able to produce pro-duce more work lo the moving . air than to still air. The results are shown lo the chart given here, which was simplified by the Holland Institute Insti-tute of Tnermology from on prepared pre-pared by the Society of Heating and Ventilating Engineers. : Other tests showed that the work- ' era' pulse rates were lowered by the I p-.wm- motion and scientists accept air beating plant. During the summer sum-mer It keeps cooling breezes moving through every room of the home. In winter It Increases heating efficiency by distributing heat more rapidly through the house and by operating on the principle of a large volume of moderately and healthfully warmed air rather than a small quantity of dry and parched air. |