270 THE PRINCIPLES OF AGRICULTURE 



at few points create dangerous drafts. Air 

 should be taken into and removed from the 

 stable in many small streams. If the stable is 

 over -ventilated, it may become too cold. If at 

 least one cubic foot of air space is allowed in 

 the stable for each pound of live animal kept 

 in it, the air will not have to be changed so 

 often as when the animals are so crowded, — as 

 is often the case,— that only one -half to one- 

 fourth as much air space is provided. 



504. A barn with a wall roughly boarded, 

 both inside and outside, and the space filled with 

 straw, furnishes nearly ideal conditions, since 

 the air will be strained gently through the 

 straw. This ventilation should be supplemented 

 by a few small, easily controlled openings. 

 Stables should not be kept above 50 degrees 

 nor fall below 32 degrees, for any considerable 

 length of time. 



505. Abundant provision should be made for 

 the ingress of light. It is best if the light is 

 admitted at the rear of the animal, especially 

 for horses. Provision should also be made for 

 temporarily storing the excrements, both to keep 

 the stable clean and to prevent loss of the val- 

 uable constituents of the manures. No excre- 

 ments should be thrown out of the windows or 

 doors of the stable into the open weather, where 

 they form a nuisance and are wasted (120, 120a). 



