C7.sc o/ 0::nne in Vent tlai ion. 273 



Siicccssrul installations have also Itccii iiiado in flic dlliccs of 'I'lir I'.rowii 

 Shoe Co. and in llic system for vciitilatiiij,' tlic ^roat liascniciit of tlio (Jrand 

 JA^adtT di'i»arliiu'nt store, rsually in tlic baseinciit of a larKO depart ineiit 

 store the ventilation is very bad. hut none of that is to he notieod in this 

 place. The air that enters from the outside is partially ozonized, passes 

 over one set of heatinj; coils, through a humidiller. and tiien (»ver another set 

 of heatin},' coils and o»it into the room. The odor of ozone can harely he 

 delecte<l hy a sensitive nose. The people employed there are unaware that 

 ozone is beinjr used hut they also have no complaint to make ahout the 

 ventilation. 



That there is a great lield for improvement in the ventilation of most 

 of our crowded buildings almost no one will deny. P.ut that ozone would 

 give relief is strongly doubtedly by a great many people. The reason for 

 the doubt has been that, while a little ozone is a good thing, a great deal 

 of ozone is too mucli of a good thing. In most installations the trouble 

 has been that not little enough ozone has been used. Like perfinnery 

 the best effect is secured by the use of almost vanishingly small quantities. 

 If the ozone treated air is allowed to come in contact with water, as in a 

 humiditier. most of the ozone is decomposed. During tlie decomi)<)sition 

 the opportunity to oxidize any organic matter present would he very great 

 so that a very high percentage of bacteria and bad odors would be removed 

 and destroyed. 



Ozone, moreover, has a tendency to cling to the clothes and to the skin 

 which are the source of many of the bad odors. The writer has noticed 

 the smell of ozone clinging to his fingers and clothes for a couple of hours 

 after working with the substance. Such an accumulation of ozone near 

 the origin of the deleterious substances would be especially effective in pre- 

 venting them from getting out into the air. Before these ideas are accepted 

 generally, however, very carefully controlled experimental work must be 

 done. It is believed by many who have gone into the matter carefully and 

 without prejudice that ozone can be successfully used to solve a large 

 number of the problems of ventilation provided constant care is taken 

 to allow for its peculiar properties and tlie resulting limitations placed on 

 its use. 



