| Show from the american agriculturalist A 7 ah ano im important P octant hint milt or two dio about warming dwellings Dwelli schoolrooms school rooms e eto etc tc A world of comfort to say nothing of health would be saved to the great mass of peo people pie if hey they understood 0 one n e simple philosophical principle a and nd applied that knowledge to the warming of their dwellings let lot us examine the matter matter a moment now that all are providing for the approaching cold weather we will tr try to explain the principle referred to so as to 0 be understood by the unscientific reader i common air has the property of absorbing a certain amount of moisture or water which it it secretes or hides and it becomes insensible so to speak peak the amount of water which a cubic foot toot or a room full of air can thus secrete depends upon the temperature of the air that is upon how bow hot or cold it may be thus at the common summer temperature say 70 a hundred cubic feet of air absorbs or renders insensible to sight and feeling about grains of water reduce the temperature pera ture of this air to the freezing point 32 and it will hold only grains of water the rest will he be deposited 0 on n the colder surfaces on the contrary raise the temperature of the air to 1000 loo and it will then absorb 1912 grains of water illustration A room 15 feet square and 10 feet high contains 2250 CUDIC feet therefore rethe in such a room the air at the freezing point 32 would contain grains ot of water or a little more than three fourths of a pint raise the heat to a comfortable warmth say 70 and the air will absorb and secrete grains of water or over 2 12 1 2 pounds 2 1 at 1001 loo it would absorb grains or over three quarts more than this must be provided for or the air will be dry and disagreeable on a warm autumn or spring day the air will appear dry and clear thou though t h it contains a large amount of moisture but at night the cold ground reduces the temperature pera ture of the lower stratum of air and the result is that the moisture which during the day was insensible is now sensible the air is damp and that the moisture is frequently visible in the form of fog pt there ere is really no more moisture in the air b bat t what was concealed when it was warm during the day cay is now made sensible As soon as the sun heats beats up the air sufficiently it again conceals the moisture and the atmosphere is clear 0 on n a hot day the air is dry and clear above musj us and not riot a cloud is to be seen presently we see mist and clouds gathering overhead over head bead these clouds do not come from a distance but they are formed right in the air which but a few hours ago was apparently BO so dry and clear the reason is that by some means say by y a cold current of air the temperature of the air has been reduced and the moisture before invisible is now visible the minute particles of I 1 water vater unite toge together therso so as to be seen in the fo form rin of cloudy cloady vapor and if the reduction of temperature goes on the particles of water will condense still further and form drops of water that descend as rain now how for the application the air in a room contains a considerable quantity of water if the room be cold the air feels damp close the room yoom so that the air cannot escape nor be mixed with fresh air from without and then heat it As the temperature rises the moisture will leave the walls and the entire air of the room will become dry the water haal hasl not left the room during this warming process but it has been secreted in the air itself which is now like a dry s sponge onge it picks up the particles of moisture rom tom from tie the the skin and it feels dry and husky the air we breathe also dries out the lungs so to speak bring in a dry cold body say a pitcher or tumble tumbler r of water and this wili will cool the adjacent air to such a degree that it will condense the moisture that was insensible while the air was warmer in a room heated by an open fireplace fire place there Is i a large current of air going up through the chimney and consequently a coni conr constant tant change of air in the room and the lack of moisture is not felt in a room heated by a stove with a narrow draft there is less consumption of air and as the confined portion becomes heated it ge secretes the moisture odthe of the room and a dry unpleasant atmosphere is the result set a teakettle or other essel vessel on the stove with a little water so that it will boil briskly and the watery vapor will soon supply the place of that which has been secreted and the result will be a warm moist genial atmosphere A i fire should never be built in a stove without placing p I 1 acing u upon ee n it at once a wide open vessel of water to keep the room saturated with vapor even eyen then I 1 the air will be dry and unpleasant at first p until the water is hot enough to send off vapors orp or steam freely heating by steam circulating in ir iron on pipea 1 is on one account the most unpleasant a nt not to say unhealthy methods of warming room rooms sand and simply because of the difficulty of placing water upon the pipes so as to be rapidly Z evaporated those who are using using team steam pipes pires will lil iti III find great relief it they will keep ef moistened cloths claths hanging banging over some portions porthos of tha 9 pipe to give i out a supply of bf moisture to ihal th air without some means of sullying supplying lying tying extra I 1 moisture steam pipes are decided decidedly sug aug ya objectionable I 1 j we feel quite suret surer sure that the method of heat beat j ing by hot air pipes irom a furnace is the i most convenient agreeable agre egbe eabe and even health beaith I 1 ful provided always hat hat bat suitable arrange ments be made to keep k beep the hot air constantly saturated with moi mol moisture iture without this the hot air absorbs all the moisture from the walia walla abid furniture of the room and from the sur face of our bodies ands from the shi e lungs our own dwelli dwelling bg tg is heated he atell throughout ty by afur atur naceur nace in the cellar A con coA constant stant current of fresh flesh air ei is conveyed from without to this furnace where it is warmed by a lar large i h beating e at heating 1 in I 1 au surface outside of the barnin burning coa coal I tin pipes convey this fresh warm air to the several rooms in large or small quan quantities quantity titi ps as required but in the upper lipper part pirt of the furnace directly over the fire a large wide open vessel is kept constantly constanty supplied with water the vapors of which saturate all the thie warm warn air ascending to the rooms the ile result is the air is moist warm and what is quite important ant it is constantly renewed and fresh which is not the case when the confined air of a room is heated by a stove we thus get rid not only of the trouble of building and watching te aka fires in half a dozen rooms room 9 but also of the dust and ashes necessarily attending their use their is also an economy of fuel for the large beating heating surface of a good furnace appropriates the heat better than the ordinary single stoves let the hundreds of families who have unused hot air furnaces in their dwellings try the effect effect of providing an abundant supply of moisture along r with the heated air any one may readily convince himself of the difference made in the air by the addition of watery vapor let two rooms be equally heated by stoves staves in one let there be damp clothing as on an ironing day while the other hai hap ha no provisions for supplying supplying plying vapor the air in the one room will sur suT be e dry ry husky and exhausting in the other it will be aa as genial and pleasant as a spring morn morning |
