FARMYARD MANURE. 23 



lost thus no less than 7 7 '7 per cent, of the original quantity of 

 insoluble organic matters. 



5. If we look to the total amount of nitrogen, we shall find 

 that the original proportion of nitrogen in the manure, amounting 

 to 9*49 Ibs., was reduced in the course of six months to 7*70 Ibs., 

 after nine months to 4*14 Ibs., and after twelve months to 

 3-88 Ibs. 



At the conclusion of the experiment more than half the quan- 

 tity, or, in exact numbers, 59'1 per cent, of the nitrogen con- 

 tained in the fresh manure, was wasted. 



6. If we replace, in the analysis made on the 15th November, 

 1855, the number which expresses the amount of insoluble 

 mineral matters by the number 66*93, expressing the proportion 

 of insoluble mineral matters which the manure contained at the 

 commencement of the experiment, and which it would have also 

 contained had no earthy matters been mixed up with the manure, 

 and add to it the other constituents, we obtain for the corrected 

 composition of the whole manure in November, 1855, the fol- 

 lowing numbers, which for comparison's sake are contrasted with 

 the analysis of the fresh manure of November, 1854 : 



At conclusion of 



When put up, experiment, 



Nov. 3, 1854. Nov. 15, 1855. 



Ibs. Ibs. 



Weight of the manure 1652 950 



Amount of water in the manure 1093 622*8 



dry substances 559 170'85 



Consisting of : 



Soluble organic matters 40*97 3*95 



* Soluble mineral matters 25*43 5*52 



flnsoluble organic matters . t 425*67 94*45 



Insoluble mineral matters 66*93 66*93 



559*00 170*85 



* Containing nitrogen 3*28 '32 



Equal to ammonia 3*98 '39 



f Containing nitrogen 6*21 3*56 



Equal to ammonia 7*54 4*25 



Total amount of nitrogen in manure 9'49 3*88 



Equal to ammonia 11'52 4'64 



The whole manure contained : 



Ammonia in free state *55 '0055 



Ammonia in form of salts readily decomposed 



by quicklime 1*45 *28 



Total amount of organic matters 466*64 98*40 



,, mineral matters 92*36 72'45 



It will hence appear from these results that the experiment 

 was begun with 559 Ibs. of dry manure ; after the lapse of twelve 

 months, only 170*85 Ibs. were left behind. Kept for this length 

 of time spread in an open yard, the manure thus lost no less than 



