Show MAKING STUDY OF CHIMNEYS johns hopkins university professor Pro feor has ha planned careful experiment experiments Conc concerning eming their behavior why lire tire factory chimney built the way ay they aro the ilia to thil this question according to prof A CI 0 christie Chr letle of tho th delmirt ment of ciccion ut at johns flop lilus util ie Is that the first stacks to be built bilat way ay nud and everybody elee else liae has fol followed loed the etutus ale attle Is 1 really 11 known says professor christie Chr letlo of the internal netlon of the gases in a chimney and lie tit lot accordingly undertaking some invests mationg into the matter lie he ime ling cui coll on the grounds of the alty a clil muey with two platforms one 25 feet trot tho ground and tho other 25 2 feet higher lehor li both of them reached by an iron iran ladder at each platform form the masons have left oloti lug ings which will ordinarily be plumbed up but nill be cleared whenever he never the obe enere are ut at work through euch each aperture it will bo be possible for the ex to project instruments lor tor the study of the gus iru ellow flow careful records roc III be kept oa an material for it 11 diore precise knowledge of the factors on which nn an ef effective draught do penda pendu an explanation will thus bo be found it Is holod of the difference in the behavior of chlone why that I 1 to say ono one smoke will draw like a va vacuum cuttin cleaner while will choke liko ilko a flivver vee which filch hus ling lost a cylinder or two |