DISPOSAL OP EXCEETA 



375 



mechanism for the yard where only rain and yard water 

 enter, but it requires regular cleaning out owing to the 

 amount of sand and gravel which get washed in. 



Whatever system of trap is employed in the stable, daily 

 flushing with water is essential ; for this purpose pipes should 

 be placed at convenient intervals with a length of hose. 

 Gullies in the yard should also, especially in summer, 

 receive an occasional charge of water to replace that lost by 

 evaporation. 



Fig. 164. — Fixed Syphon Stable Trap with removable bucket. 



Cesspits, Liquid Manure Tanks, and Manure Sheds. — The 

 use of these is imperative in places where no sewerage 

 system exists, but the storing up of decomposing organic 

 matter is a serious question, and one to which the greatest 

 attention must be paid if soil pollution is to be prevented. 

 What we have to arrange for is the collection and storage 

 of all urine and faeces from cow-sheds, stables, piggeries, 

 and straw yards, and for this insanitary proceeding to be 

 carried out on lines which will prove as little hurtful as 

 possible. 



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