Show aa let our motto be GOOD HEALTH BY DR LLOYD ARNOLD proffesor profesor 0 sor f bacteriology o and preventive medicine university of illinois iiii nois collese of 0 medicine AIR conditioning almost everyone has had the expert asperl ence on a hot summer day of going into a movie picture theater that has had a sign sl n an n 0 u n c I 1 n 9 COOL INSIDE F for or the first few moments we havea have a grateful sense 0 t f comfort the a air I 1 r seems delightful atter after the sizzling blasts on th the street estreet then gradually it dawns on us that we are cold if we have a wrap we put it on but most of us 03 dont carry wraps when the temperature Is near the hundred mark moreover we have discarded every article of clothing that our sense of public decency will permit us to discard we debate whether we should go out and get warm but we remember the of the heat eventually though we leave and as we reach the sidewalk the hot air makes us gasp for breath we feel suffocated we become cold clammy we may even have a strong feeling ot of nausea A few of us may collapse entirely obviously this Is over refrigeration the purpose of air conditioning is to make us comfortable and if we are uncomfortable when we go from the outside hot air into the inside cooled air and acutely uncomfortable almost to the point of sickness when we go from the inside cooled air into the outside hot air again then something is wrong the skin Is the largest organ of the body if it were spread out on the floor it would be the size of a rug seven or eight feet square when the outer air Is cooler than the body the skin tries to prevent heat loss by reducing the amount of warm blood flowing blowin through this body covering layer while it Is impossible tor for the body to prevent loss of heat by this mechanism still excessive dissipation of heat beat Is 13 avoided but the skin loses heat and acts as a radiator in spite of all that the body can do during cold weather we lose two thirds of the heat beat value 0 of food through our skins sixty five cents of every dollar we spend tor for food is 13 used to heat the air in which we live on the other hand in the summer the skin acts like a gefri refrigerator aerator we secrete water into the outside skin and the evaporation of this water cools us when you go from the street to an artificially cooled room during a warm summer day your skin ekin has to change in a moments time from a refrigerator to a radiator on the street your skin Is working to keep your inside organs from getting too hot for when the temperature of the air Is above normal body temperature the skin works hard to keep the body from being heated up to the air temperature the only health problem in artificially cooled theaters restaurants office buildings and homes Is the difference in te temperature m pera ture and comfort between and the inside air there are several separate points to be considered si the sense of comfort Is the desirable end point this Is a combination of three factors namely temperature pera ture humidity and air in movement ov ement when the air Is saturated with moisture it feels hotter than air of the same temperature with lower humidity some recent work tends to show that there should not be more than 10 degrees difference in temperature of the air inside artificially cooled rooms as compared to the outside air but there should be 40 per cent less moisture in the air in the refrigerated rooms there should be some air movement but not a draft or wind sufficient fent to keep beep still air pockets forming formin around people sitting in these rooms the fhe greatest factor however according to these investigators Is in the humidity of the air some restaurants and theaters maintain a 20 to SO degree fahrenheit difference fe in temper temperature ure between inside and outside air upon entering such a room maintained at say bay 70 F from a street temperature of 1000 to P one feels a sense of coolness and well being abeln then adjustment of the body to the temperature takes place and this thia sense of well being disappears return to the street after an hours sojourn Is like ike stepping from northern canada to southern louisiana in one step the skin tries to make tola this rapid adjustment as best it can this is sometimes hard to do quickly the internal temperature rises in spite of all the valiant attempt to change itself instantaneously from a that is why radiator to a refrigerator dizziness pauses and even collapse may accompany this rapid change from a november to a july day we do not know enough s bout air conditioning of rooms in the summer time to make rules as yet a 0 western newspaper union |