SANITATION 



591 



per diem, or for the same number 5,110 square metres per 

 annum. This affords twelve months' rest for each trench. 

 Where the soil and all conditions are particularly favourable 



Disposal of Excrement as Manure. Chinese Method. 



(l) Chinaman taking from public latrines 

 in a Government receptacle fresh human 

 ordure. 



(3) Filling his private bucket with the 

 contents of manure pit, consisting in part of 

 fa;ces kept sufficiently long for eggs to be 

 destroyed, but in part sufficiently fresh for 

 eggs to retain their vitality. To the contents 

 of this bucket water is usually added. 



(2) Decanting into his manure pit where, 

 if kept long enough, the eggs of most entozoa 

 will be destroyed. It is rarely kept long 



enouiih. 



(4) Watering vegetables, including those 

 used for salads or eaten raw, with the contents 

 of this bucket. The great prevalence of 

 " flukes " (trematoda) amongst the Chinese 

 is probably due to the general use of some 

 such method. 



the land can be retrenched in six months. It is al^va^•s best 

 to arrange it so that one trench takes one day's supplv, thirty- 

 one trenches for a month's supply. The earth should be 

 raised dome-shaped when covering them in to allow for 

 sinking. 



