146 



On the Application 



1st year, by mangel-wurzel, = 

 2nd do. wheat, 4 qrs. 

 straw to do. 



3rd do. 

 4th do. 



5th do. 

 6th do. 



clover, 

 oats, 7 qrs. 

 straw to do. 

 turnips, 25 tons 

 wheat, 4 qrs. 



30 tons 

 1900 lbs. . 

 3000 

 2600 

 3000 

 3000 



1900 



Total of phosphoric acid 

 As 214—442—71—147, about = 147 lbs. of phosph 



Added to ditto per acre during the same period 



1st, The phosphate of lime present in the dung of 

 cattle fed on the farm 



lbs. oz. 



2ndly, Straw of the wheat . 1 12 



, , oats . 112 



quantity unknown. 



3 8 

 3rdly, Fifteen bushels -of bone-dust at 56 lbs. pei 



bushel, consisting of — 

 Animal matter 

 Various salts, not phosphate 

 Phosphate of lime 



839 10 



lbs. oz. 

 3 8 



230 

 9 



Total 242 8 



Now it follows from this calculation, that Mr. Morton had 

 added to his land, in the course of six years, more by 171 lbs. 

 of phosphoric acid than had been taken off from it by the crops, 

 even without reckoning that present in the dung of the sheep and 

 cattle, the quantity of which is not ascertained : so that it would 

 appear, either that a much smaller amount of bone earth would 

 have answered as well, or that some other purpose besides that of 

 supplying the crop with phosphoric acid is fulfilled by it. 



It must evidently be of the highest importance to determine 

 which of these two be the true statement, since, if the former 

 should turn out correct, then an unnecessary expenditure of an 

 expensive material has been incurred; and if the latter be esta- 

 blished, its recognition might lead us to discover some other 

 material by wdiich this secondary object could be more effectually 

 attained. 



Amongst many other suggestions that may occur to us from 

 having such tables constantly before our eyes, there is one to 

 which I shall advert, inasmuch as it bears relation to certain 



