Show tins aarn unlike fog haze commonly occurs during an unusually dry state of tha lower stratum of air jn considering ita cause it las been suggested that the email quantity of matter required to produce the dimming effect should always be borne in mind if the ev can observe the change that comes a drop of water when the fifty millionth of a gram of is autro possibly a weight of water or dust not much greater would suffice for visibility in a column of air 1000 beet long the air is a all times charged with dust particles to a degree difficult to realize the purest air tested by mr when making his measurements on abb top ot ben nevis contained about dust particles to each cubic inch which would give particles to ever cebia foot or to a hori contal column of 1000 feet this bein the cs se it is manitt thata condensation upon a small proportion of these or momentary adhesion by electric attraction would suffice to produce the affect called haze or haziness |