ox THE TRKATMENT AND UTILIZATION OF SEWAGE. 161 



The succeeding Tables, Nos. IV. to VI., show the relations between the 

 ajiount and composition of the Sewage applied to the land during the twelve 

 mouths under review (the amount given as applied to each plot being neces- 

 sarily, at the best, only an approximation) — the amount of the various Crops, 

 as estimated from the weight of average samples, and their composition as far 

 as it could be ascertained from the most reliable data, viz. tables furnished 

 by Messrs. Lawes and Gilbert, and those published in the Second Report of 

 the Sewage of Towns' Commission — and the amount and composition of the 

 effluent water. 



Tables V. and VI. also show the amount of nitrogen unaccounted for, 

 which either remains in the soil or has partly drained away into deep subsoil- 

 waters. 



1S72. K 



