52 



Diagram B, showing a stable in cross-section, will indicate the 

 best method of building walls and ceiling and also illustrates two 

 different methods of introducing the fresh air in the Rutherford 

 System. There is very little to choose between these two methods; 



DIAGUAM B. Sectional View of Barn, showing Rutherford System of Ventilation 



that on the left is somewhat more cheaply installed and can be intro- 

 duced at any time, while the method on the right is probably some- 

 what more effective, slightly more expensive and must be installed 

 when the building is being erected. The following explanatory para- 

 graph will help to a full understanding of the features illustrated. 



