Show Colds Headed Off Chlorinated air has bas been u used ed very successfully as a preventive pre pre of ot colds coldi and lung trou troubles hs by the students ot of the tho chemistry division d of the of Missouri A small amount ot of Is ml mired ed with the air and this Is sent Into the room ventilators Bv Ih this tIus means menns the air Is purified as it the room and the use of air outlets makes It possible for the air to be changed as ns often as asIt asit It is thought necessary D ary A decided Im Improvement pro provement ement has been noticed so 50 fir far as asi i th the prevalence pre of colds Is concerned I among the students |