The Montgomery advertiser., 1901-07-14

hneS mat be ldispiaeed 1by cool air. In. frod,,ce cola water into q t1mbler of warm wafer. in any way you like. and the cold water will displace the warm, and drive it. out above, 90 long as the tumbler is tight. But let there be a hole in the bottom of the tumbler and the cold water will rush out of that opening, and if any water remains in the tumbier 1t will be warm. The necessity Is for house air tight below and open above.
 J'sDeaths and prostrations during the passage of hat waves are not due directly to the heat at all. The pros. trations gre not due so much to the midity. A dry hot wave hurts no one. From the torrfd gone to the arctic re- sions there is hardly any variation in the blood temperature in man. If man were given tn eproblem of preserv ing q fiuid at constant temperature the whole year round 1t would be dif- ficult problem. Mature has solved it by providing means for the heating and cooling of the blood so as to keep 1t substantially at q constant tempera- ture, under all ordinary conditions of heat environment. Tn the perspiratory. system means is provided for cool ing the body. and consequently the blood. by the evaporation of water brought to the surface of ,the skin through multitudinous pores. Without evaporation there is no cooling. The rapidity of evaporation depends upon the dryness of the air. When great hu- midity exists, and the hot air is filled with aqueaus vapor nearly to the point of condensation. the body may be ~s~k~ ~~xfA -l~At fA~. hat ( %f<<~x will not take place.
 Dry Ar and Clothing.
 'Hence the enemy Is not heat, but moisture. The amount of aqueous vapor in the air has more to do with deaths and prostrations than elevation of the temperature.
 Tt should be possible for man to cool or dry the internal temperature of his house to any extent. It Is more im- portant that the house atmosphere should be dry than that 1t should be cool. in order that the precipitation on Che body may be allowed to evaporate. Cooling the internal air of the house alone would not do 1t. for then we in- crease the humidity of the contained atmosphere. People in hot countriSe agitate the internal air by means of a punkah, We adopt the same method by rotary and other fans. Fans of any sort depend for their effect upon the dryness of ths air. When we consider what we should do to render our houses comfortable during hot waves like the present it is of first consequence that we should dry the air. The character of our clothing Is also of importance. It should promote evaporation of moisture from the skin. It should he aAe anfg k&l hrtv> ~ 1t to the outer surface Of the clothing to be evaporated. It would he still better to have no clothing at all. but this our civilization would not permit" May Cool Houses with Liquid Air.
 Mir. Bell was asked to sum up his observations.
 During progressively hot weather Of the kind we have been experiencing, he said, "it is advisable to fill our houses with cool, dry air, and to agitaae the air. There should be free exit into the atmosphere above and escape below should be obstructed or prevented. A tank of liquid asr in the upper part of the house would. by its evaporation, cool the lower part of the house, or the entire dwelling. if there were no escape below. There is great future for liquid air in this application, if it can be produced cheaply. The cost of the necessary plant could very cheaply supply houses with cool, compressed air through system of pipes in the same way that water and gas are now sup piled. This seems to me to be the most practicable solution of the prob lem.
 But two things are requisite-the formation of a city plant like that used in Popp's system of compressed air, in Paris, and modification of the houses receiving the compressed air. so as to prevent or limit the escape below and permit the free escape above. feel pretty sure that with a large plant sup plying compressed air to multitudinous houses the cost would be so slight that air could be supplied to tenemerfts and factories, and relieve suffering and pre- vent deaths by wholesale. The statis- tics of death and prostration are su.- dcientiy great to show that this ques- ton is one of immediate and pressing importance"