480 



Town Sewage. 



produce without manure. Notwithstanding this, it will be seen 

 that it gave upon the whole more total produce per acre under 

 the influence of sewage than did the naturally better soil of the 

 10-acre field ; and, it will be shown further on, that the sewage 

 was in its case both more completely utilised and more com- 

 pletely purified. Moreover, it appears that, by the application 

 of sewage, a supply of green food was obtained much earlier and 

 much later in the season, when it has a special value. 



Table VI. — Quantities of Sewage applied, and of Green Grass obtained, 

 per Acre per Annum, in Experiments made at Eugby. 



Seasons 1861, 1862, and 1863. 



Plot 1. 

 Unsewaged. 



Plot 2. 

 3000 Tons Sewage. 



Plot 3. 

 6000 Tons Sewage. 



Plot 4 

 9000 Tons 



Grass obtained. — Five-Acre Field. 



Ten-Acre Field. 



Averages : — The Tliree Years and both Fields. 



1861, 2, and 3 



9 60 24 22 52 7 30 62 6 



32 12 15 



Our attention must here be restricted to the general character 

 of the results obtained, and the practical conclusions to which 

 they seem to lead. 



With the exception of the cold, wet season of 1862, the greater 

 the amount of sewage applied the larger was the produce ; 

 still the increase in produce was not commensurate with the 

 increase of sewage applied. To produce a maximum effect from 

 a given amount of sewage, the doses must be comparatively 

 small ; to produce the largest possible amount of produce per 

 acre, 30,000, 40,000, 50,000 tons might often be applied with 



