Norwich bulletin., 1921-07-28
HEAT AND HUMIDITY
 MAKE HUMANITY SUFFER


 Norwich sweltered through another day of 90 or thereabcuts by the ther mometer on Wednesday with an at mosphere charged with humidity from which the suffering populace vainly sighed for relief. The electric storm of Tuesday evening, of which Norwich received only the frfnges, had no ap- preciable effect in reducing the heat or the humidity on Wednesday, but further thundershowers are promised by the weather department from which it is fervently hoped that relief may be at hand.
 While the Bulletins thermometer which is located in a spot where the sun never strikes showed only 90 de- grees as the high point in the last two days, thermometers in a number of private houses have shown 93 and 94, while any thermometer that was exposed to the sun for short time ran up to 120 and beyond
 The humidity has been high and as result the precipitation from ones body is not evaporated by the air and the result is that sticky, close, .un- 1 comfortable feeling. When the humid . ity is low, the moisture dries quickly from our skin and the result is that one is rapi1ly cooled off.
 ! But the adage Its an i'll wind that | blows no one good" holds good in i the case of humidity also, and while humanity suffers, plants and vegetation are thriving, as plant life depends or ] considerable humidity.
 1nasrnuch IS no instrument is more sensitive to humidity as the human body, and as we have experienced ar unusual amount of heat during the pas two months, combined with abnor ma humidity, the nature and origin of hu. midity is of important interest.
 Watery vapor is continually bein, distilled into the atmosphere from tn, vast water surfaces. including tn oceans, bays, rivers and lakes, as wei as from moist soil These minute mole cules are generally invisible as the, ascend into the air, but if the highe air strata be considerably cooler tha1 the water surface, the evaporating wat CT is immediately converted into fog O vapor.
 An instrument, composed of tw, ] standard thermometers and known a a hygrometer, is generally used i measuring humidity. Around the mer cury bulb of one of the thermometer is wrapped a single thickness of cam
 bric which should be changed ever few weeks. When an observation (
 humidity is desired the cambric
 saturated with water and the instru
 ment is twirled on a pivot so that
 will receive full benefit of evaporatio
 while coming in contact with the sur
 rounding atmosphere. This evaporatio
 will lower the wet bulb thermomete and it is this degree of lowering
 comparison with the dry .thermomet, from which the relative humidity
 determined.
 The relative humidity is then obtai ed by applying the difference in u reading of the wet and dry bulbs
 table of estimates, taking into COT
 sideration the temperature. The orig
 nal mathematicians spent months con
 bling the theorem, which forms u a basis for the tables used now. V By relative humidity Is meant u e amount of moisture that is contain, q in the atmosphere at a given time wh, "a compared with the amount that the 2 l. at the temperature can hold. If il
 temperature falls, it's capacity for mo P sture becomes less and enough wat
 may be condensed in the form of clol or fog. It is exactly the the same priI . ciple that makes drops of water co q dense on the outside of a glas of i U water on warm humid day.