62 Farmyard Manure. 



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 



tlnsoluble organic matters 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 



t 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 69*8 per cent, in fertilizing matters ; or, in round 

 numbers, two-thirds of the manure were wasted, and only one-third 

 was left be/tirtd. This fact teaches a most important lesson, and 

 speaks for itself so forcibly that any further comment appears to 

 me useless. In conclusion of this third series of experiments, I 

 may, however, give a Table which may be found useful in calcu- 

 lating the loss in the various fertilizing matters in any given 

 quantity of farmyard manure kept in a similar manner, in which 

 the experimental manure No. III. was kept. 



