CONSTRUCTION OF VENTILATOR 



337 



and dangerous drafts. If the stable is planned simi- 

 lar to the diagram, Fig. 88, the horizontal ventilating- 

 tube arrangement may be adopted as follows: Place a 

 box of about ten inches by one foot six inches flatwise 

 against the ceiling and over the hallway in front of the 

 horses. The lower side of the box and about 

 one -half of the two sides should be provided 

 with openings, either by means of auger holes 

 or by placing slats lengthwise one-half inch 

 apart. Valves at the external openings serve 



Straw-mow over stable 



STRAW 

 CHUTE 



Fm. 89. A straw chute and ventilator combined 



to prevent too rapid egress of air out of the building, in 

 windy, cold weather. The straw chute may also be used 

 in part as a ventilator. Fig. 89. 



The walls of the stable should not be too tight, or 

 the moisture of the dampish air in the stable will con- 

 dense on the inside walls. A damp stable is very objec- 

 tionable. If not enough fresh air enters the stables 



