250 Farmyard Manure. 



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

 1855, the number which expresses the amount of insoluble 

 mineral matters by the number 6G"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. 

 lbs. lbs. 



Weight of the manure 1652 950 



Amount of ■neater in the manure 1093 (:;22'8 



„ diy substances 559 170'85 



Consisting of : — 



Sokible organic matters 40'97 3"95 



*Sohil)le mineral matters 25*43 5'52 



tInsoUible organic matters 425'67 94"45 



lusohible mineral matters 66'93 66'93 



559-00 170-85 



* Containing nitrogen 3-28 -32 



Equal to ammonia 3-98 -39 



"i" 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 li-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 lbs. of dry manure ; after the lapse of 

 twelve months, only 170-85 lbs. 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, tico-thirds of the manure icere ivasted, and only one-third 

 was left behind. 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. HI. was kept. 



