. Ventilation for dwellings, rural schools and stables. ey are in vio-lent exercise. Even in the case of the heavy feedinsr ofanimals for the production of milk or of flesh propoi-tion-ately more air must be breathed, and hence when animalsare closely housed under these conditions more air slmuldpass thronprh the stable eaeh day. The amount of pure air which must be breathed by differ-ent animals during 24 hours, in order to supply the oxygenneeded, computed from Colins table, is given below: Amovnt of air breathed by different animals. Per hour. 1 Per 24 hours. cu. ft. lbs. cu. ft. Volume. Ho
. Ventilation for dwellings, rural schools and stables. ey are in vio-lent exercise. Even in the case of the heavy feedinsr ofanimals for the production of milk or of flesh propoi-tion-ately more air must be breathed, and hence when animalsare closely housed under these conditions more air slmuldpass thronprh the stable eaeh day. The amount of pure air which must be breathed by differ-ent animals during 24 hours, in order to supply the oxygenneeded, computed from Colins table, is given below: Amovnt of air breathed by different animals. Per hour. 1 Per 24 hours. cu. ft. lbs. cu. ft. Volume. Horse . ? .•«).2 272 224 89 58 34 2 .3401 28(H 1103 72U 425 29 15 X 15 X 15 ft. Cow Pltr 14 X 14 X in X 10 ft. Sheep 9x 9x 9 ft. Man 8 X 8 X 8 ft. Hen 3x 3x 3 ft. 10 Ventilation. From this table it appears that a horse must draw intoand force out of his lungs, on the average, each hour, some142 cubic feet of air, the cow 117, the pig 46, the sheep 30and the man 18 cubic feet. These volumes are representedin Fig. \ V s V -. _, JJ- ~ ^ 1(1^ J^ -^^ ^ ) ji \ ... ,.. ( i^ .-? ?:?- :-•?? ?/ P Fig. 5.—Here each small square in the illustration represents one footand each pile of cubes the volume of air breathed each hour, whichshould be nearly pure. If it were necessary to supply air to our stock as we dowater the horse would require continuously 7 full pails perminute; the cow, 6; the pig, , and the sheep, fullpails of air, and these are the amounts required when it issupplied pure and fresh with each respiration, as would oc-cur out of doors where there is a free air movement andwhore the air thrown off from the lungs is at once borneaway by the winds. Inside a dwelling or stable the condi-tions would be very different unless some means were pro-vided to maintain a constant change of air at the properrate. Air Breathed Loses in Sustaining Power. 11 AIR ONCE BREATHED HAS LOST MUCH OF ITS SUSTAINING POWER. Air once breathed has lost mu
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectventilation, bookyear
