Show ran 0 n expert dis s ea ct s rp ang ill garvard professor explains that precipitation Is really forced draft cambridge mass now we tte line have tile the truth about mill making 1 prof alexandar mcable expert and director of tile the blue observatory ut at harvard offers un an article to tills this effect in the current issue of the ilar ivard alumni bulletin clouds can be taken into the laboratory and studied these days it Is tile the forced draft that brings the rain the professor says sai and that it would mould take considerable band itlie time to till tell of natural rain makers A great cause Is the mountains experiments now in progress by and warren under the auspices of the air service tho the article icicle says InA indicate leate the possibility ot of clarifying cloudy atmospheres by with electrified sand from above dabove it seems feasible fog whether in tho the streets of london idon or on tile the banks of newfoundland lor or over flying fields Is essentially a awall built of ionized nucleated vapor bricks finds fog elements element quite a remarkable wall too for while it often rests on oil tile the ground it can spring into tile the air and goat float away and this without the slightest noise or damage it never neer stands still and Is alloys falling find fadhil anti yet iet at the itlie same time rebuilding A thimbleful of fog stuff contains about a 0 tit thousand bricks and all these 11 squeezed tightly together will make only a small drop of rain nature Ka ture wrings brings the clouds and makes rain by pushing moisture laden air upwards or else elie sidewise into on an other current decidedly older colder it II Is tile the forced draft which counts the simplest case of upward push la Is tile lie shower of su summer nuner the surface air and rid vapor Is lifted it thousand meters annd nd the expansion cooling coalescing and capturing of comparatively largo large dust aust particles produce a cumulus cloud the cloud that makes one think of a colossal helping of celestial tee ice cream tile tho crenin cream tint soon gives ches way to a dirty gray and tills this in turn dark e ens ns into the brown black base of a cuvitilo ready to spill lightning to another cloud or dart it earthward wa rd noah up in the air few university men inen realize that noah coill was considerably up in ili the air tit at the end of the lie big flood yes it if he h e was near tile the top of ararat lie he was a aill mile fart further up tip than lhnn one who stands on the top of pikes peak some flood |