Croydon. 



The mode of Treatment is to 

 apply the sewage to arable land 

 (usually, not invariably) and then 

 to pass it over one or two, and, occasionally, three, 

 further plots. It is distributed from concrete 



Treatment 

 and Croppingr- 



be sewaged. In 1900 about one-half of the irrigable 

 area was rye-grass, 100 acres permanent pasture 

 (which is also irrigable), and about 100 acres of 

 arable land. The crops are utilised in part on the 

 farm premises and partly sold. 



carriers into plough-cuts about 50 ft. apart; these 

 terminate before the end of the plot is reached and 

 the land between is dished. Sewage is applied con- 

 tinuously for twenty-four hours, and the land is then 

 allowed to dry for two or three days. In wet 

 weather, however, it is necessary to use the same 

 land for three to five days in succession. The 



Analyses- 

 Sewage, Effluent 

 and Stream. 



The whole of the sewage is 

 screened, and, in addition, one- 

 quarter of it passes through small 

 settling tanks, in which, however, 

 the settlement is very inadequate. It arrives at the 

 farm well broken up as a rule. The chief Chemical 

 results are : — 



Experiment will be dealt with hereafter. Cropping. 

 — Italian rye-grass is the chief crop, mangolds, 

 cabbages and oats are also gfrown ; the oats cannot 



" These effluents varied a good deal in appearance, 

 some of them being clear and almost colourless, and 

 to all appearance excellent effluents; others of a 



31 



