FARM BUILDINGS 



337 



although it is usually agreed that it should not be below 

 50 Fahrenheit. 



There are two systems of barn ventilation in use, the 

 King and the Rutherford, the main difference being in the 



4 



4 



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Canvas eurfo/n around each 

 f*\ yea/, iron straps or r*</s aem- 

 /??e</ /n of bottom to ho/cf/f 

 cfotva Pi///eyano / coro / a/- 

 fochmeaf fo /iff cur fa//? up 

 ouf of woy wheanofneeoecf* 



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3 





TJIWTJFSir 



Fig. 267. Rutherford system of barn ventilation 



shape and location of the intakes, as indicated in the illus- 

 trations. In the Rutherford system the air is admitted at 

 the floor, across which it moves to the outlet located at 

 the same elevation and is carried by a shaft to the highest 

 part of the building (Fig. 267). In the King system the 

 air enters a shaft near the floor and is carried up to the 

 height of the ceiling, where it is admitted. In this method 

 the cold air becomes tempered by the heat before reaching 

 the animals and does not constitute a cold draught. The 

 outlet is located near the floor, the shaft ascending to the 

 highest part of the building (Fig. 268). 



