FAKMYABD MANURE 



309 



portion of it is therefore retained. Potash, 1 on the 

 other hand, is not apparently withdrawn from solution to 

 any great extent, and usually appears in the urine in 

 much larger quantities than phosphoric acid. Not only 



NITROGEN IN ANIMAL PRODUCE AND VOIDED, FOR 100 CONSUMED 



AS FOOD. 



ASH CONSTITUENTS IN ANIMAL PRODUCE AND VOIDED, FOR 100 

 CONSUMED AS FOOD. 



is the total quantity of fertilising ingredients voided in 

 the urine much larger than that voided in the dung, 

 but even when compared weight for weight, the former 

 is often richer than the latter in all except phosphoric 



1 A certain amount of potash is lost in the perspiration of most 

 animals, and the sv.int of sheep's wool contains a considerable quantity. 

 With this exception, practically the whole of the potash in the 

 digestible portion of the food is recovered in the urine. 



