Show MAKING STUDY OF CHIMNEYS Johns Hopkins University Professor Has Planned Careful Experiments Concerning Their Behavior Why are factory chimneys built bunt the way they tiley are The answer to this question according to Prof A. A G. G Christie of the department of mechanical ical engineering at Johns Hopkins university university uni uni- Is that the first stacks smoke happened to be built that way and everybody else has followed the exam pIe Little Is really known says Professor Professor Professor Pro Pro- fessor Christie of the Internal action of the gases In a chimney and he lie Is accordingly undertaking some Investigations Investigations Investigations Into the matter He has constructed constructed constructed con con- on the grounds of the university university sity a chimney with two platforms one 25 feet from the ground and the theother theother I Iother other 25 feet higher both of them reached by an Iron ladder At each ench platform the masons have left openIngs openIngs openings open- open Ings which will ordinarily be plugged up but will be cleared whenever the observers are at work Through each aperture It will be for the experimenter experimenter experimenter ex ex- to project instruments for forthe forthe the study of the gas flow Careful records records rec rec- olds will be kept as material for a amore amore amore more precise knowledge of the factors on which an effective draught de de- An explanation will thus be found it is hoped of the difference In the behavior of chimneys why chimneys why that Is to stack smoke-stack will draw like say one I Ia a vacuum cleaner while another will ill choke like lUm a flivver which has lost losta I a cylinder or tw two I I |