HABITATIONS 



333 



on a pivot as to cover them partly or completely. In the 

 ridge he places a fixed extraction cowl. 



For byres arranged as in Figs. 132 and 133 he introduces 

 a 3-inch pipe through the wall for each stall, and to prevent 

 the air driving directly on the cattle, covers the mouth of 

 the tube with a metal box, so arranged as to break the 

 current of air and divert it. 



Henderson's views represent what will possibly be re- 

 garded as the acceptable compromise between the ideal and 



~f 



"W 



12/ '27 \liJ 





Fig. 134. — Double byre (Henderson). 



the real ; he endeavours to utilize existing buildings, and 

 to place their ventilation on some sort of definite basis ; 

 he works with cheap material, wood instead of iron, but is 

 fully alive to sanitary requirements, in spite of the fact that 

 the cubic space he recommends falls far short of what is 

 believed to be necessary. 



Lloyd recommends as ventilating means for existing 

 cow-houses, a series of iron gratings 9 inches square placed 

 in the outside walls 6 feet above the floor level ; these are 



Digitized by Microsoft® 



