Ruffby (HlfiTh Level). 



out at 171 persons per irrigable acre or 855 persons 

 per acre for the average area irrigated. The normal 

 dry-weather flow is 50 gallons per head per diem. 

 The amount treated per acre for twenty-four hoars 



one field. The farm has rather a steep slope towards 

 the river, and the high-level sewage as a rule is 

 treated twice and then mixes with the low-level 

 sewage, which comes out about half way down the 



at the normal rate of flow is 42,800 gallons on the 

 average area irrigated, equal to 8,500 gallons on the 

 whole irrigable area. 



Treatment. — Thechemical treat- 



ment has already been referred to. 



The settlement effected by the 

 tanks is very small, and the sewage on leaving them 



farm. The resulting mixture is once treated. The 

 sewage is run on the same area of land continuously, 

 day and night, for periods varying from three 

 to seven days, according to circumstances. Chemical 

 treatment was suspended for a time shortly after 

 the first visit to the farm, only being used during 

 the hot weather to lessen smell. Cropping. — The 



is distributed over the farm by earthen carriers. 

 These are very faulty, and the sluices are also in 

 disrepair. Crude sewage is occasionally applied to 



crops grown on the farm are rye grass, mangolds, 

 cabbages, oats and wheat, and they are disposed 

 of by the tenant. 



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