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Show Fans Bring Relief, "The comfort of the young men wss greatly relieved by putting on the fans and whirling the air In the chamber. They asked for the fans to be put on again when they were stopped. Circulation of th nlr through tbe clothes and ever the skin of tbe face relieved the: heat stagnation. stagna-tion. - Tbe pulse beats ef the seven students were lowered by the fun thus: 02 to T2; fid to 8ft; 128 to 84; M to 74; 100 to 1O0; 72 to 62; 02 to M." Similar result were obtained in tests on men doing muscular work. In every case tbe pulse was lessened and comfort wss increased by motion of tbe air. : Upon these experiments of Dr. Hill In based much modern air conditioning condition-ing work, aa when beat stagnation in movie theaters, large auditoriums and faotorlea Is relieved by keeping the air coursing through the occupied spaces. The same - principle Is employed em-ployed In the most modern "vapor-alre" "vapor-alre" heating ptanta. Propeller Unit Keep Air Moving. Electrified propeller units are built Into these systems so as to keep strong currents ef air moving through all the rooms of the home. Although no expensive refrigerating equipment Is employed to lower the. temperature of this circulating nlr, It moves so rapidly that It creates a cooling effect ef-fect beyond all anticipation. This latest Improvement of the warm air heating system, makes It an all-year-round air-conditioning plant the Holland Institute of Thermology points oat It Improves beating efficiency effi-ciency and economy . in winter a well as makes cooling possible tn summer. Wlnter-heaUng-aummer-cool-ing plant of this type are made for Installation in new homes, but also al-so the propeller nnlts can be attached at-tached to already existing beating systems In Old home. |