Farmyard Manure. 



39 



manure was carted back in its former place and kept under the 

 same respective circumstances until the 23rd of August, 1855, 

 when again each experimental portion was weighed separately 

 and again analysed. 



The rotten dung thus had been kept by the 23rd of August for 

 a period of 8 months and 18 days, the rest of the experimental 

 manure heaps for a period of 9 months 20 days. 



Finally the different experimental heaps were weighed and 

 analysed for the last time on the 15th of November, 1855. The 

 rotten dung thus had been exposed to^he influence of the atmos- 

 phere for a period of 11 months and 10 days, and the 3 re- 

 maining experimental portions of originally fresh dung had been 

 kept for a period of 12 months and 12 days. 



In order to render more conspicuous the results obtained in the 

 direct weighings and in the different analyses, I shall incorporate 

 them in separate Tables, which will be given under the respective 

 heads of 



1. Fresh farmyard manure, (No. I.) Exposed. 



2 .. (No. II.) Under shed. 



3 .. (No. III.) Spread. 



4. Well-rotten farmyard manure, (No. IV.) Exposed. 



Before stating these details I may say that I have taken espe- 

 cial care in determining accurately the nitrogen in each series of 

 analyses. Frequently two combustions were made of one and 

 the same substance, and invariably closely agreeing results ob- 

 tained. 



Fresh Farmyard Manure (No. I.), Exposed (mixed horse, cow, 

 and pig dung). 



In the subjoined Table is stated the actual weight of the 

 first experimental heap at different periods of the year, and the 

 loss which it sustained in these periods. 



Table showing the Weight of Experimental Heap of Fresh Farmyard Manure 

 (No. I.), Exposed, at different periods, and Percentage of Loss in Weight, 



" in Ibs. 



E2 



