Show Ventilating Experts Seek Way to Ban Odors From Front Rooms Swampscott Mass Engi Engi Engineers may discuss ventilating ventilating ventilating ing and air conditioning anc and use their layman layman baffling baffling I to describe the flow I of air but what most people want to know is what to do I about odors when they think I of ventilating In the meeting of the American Society of Heating and Ventilating ventilating from Engineers here two scientists Harvard's school of public health healt disclosed their studies about odor removal from rooms and audi Prof C C. P. P and W. W N. N Witheridge showed that there is a characteristic human smell which can can be detected in a room after the occupants have left it This j I human odor is apparently highly complex unstable and rapidly breaks down but there is a certain minimum amount of the odor left leftIn leftin leftin In a room which will last for days until it Is thoroughly ventilated The findings show that where numbers of people gather large rooms should I Ibe be used for great size acts as a sort of reservoir of odor which allows allows allows al al- al- al lows the initial decrease in intensity of odor to occur harmlessly Sharply in contrast they report reported ed is the characteristic of tobacco smoke which becomes more noxious with time up to periods of three ho hours rs after active smoking has ceased The rise in odor intensity of tobacco smoke is more offensive than the odor of fresh smoke It would thus appear state tate the It Harvard scientists that smoking rooms room should be small with very rapid ventilation for the best re re- I suits |