PROCEEDINGS OF THE FARMERS' CLUB. 141 



Carrot tops dry, 64 wet, 4G 



Green beet " " 42 " 18 



Seaweed " " 139.... " 40 



Flax cake " " 31.... " S 



Rapqcake " " 32.... " 9 



Refuse from starch " 106 " 104 



Tlie straw of wheat will yield 45 parts of ashes from 100 parts, and th« 

 100 parts will give by analysis — 



Silica 62.2 



Soluble salts 21.4 



Earthy phosphates 4.1 



Metalic oxides 1.1 



Earthy carbonates 1 1.2 



100.0 



Barley straw, from 100 parts dry, gave 41 parts of ashes, and 100 parts 

 analized yielded : 



Earthy phosphates l.'T5 



Silica 56.00 



Metalic oxides 10.04 



Earthy carbonates 18.06 



Soluble salts 19.00 



.15 



100.00 



Rye straw from 100 parts gave 30 parts ashes, and 100 parts ashes 

 produced : 



Earthy carbonates 2.0 



Soluble salts 2.2 



Earthy carbonates 11.0 



Earthy phosphates ' 25.0 



Silica 59.0 



Metalic oxides .8 



100.0 



Tiie nitrogen in manure is an organic element to which must be attri- 

 buted its principal enriching quality. The formation of nitrates and the 

 production of ammonia is due to it. Consequently we estimate the value 

 of manures by the quantity of nitrogen contained in them. This is the 

 chief cause of the enriching properties of dung. Whence then is it de- 

 rived, if raw potatoes are fed to stock, they only contain a third of one per 

 cent, of nitrogen, hay one and a third per cent., oats one and nine-tenths 

 per cent, or one hundred pounds of each contain live ounces, one pound 

 five ounces, and one pound fourteen ounces respectively. It would seem 

 at first sight that this minute quantity could be of very little importance 

 to- the plant, especially as it does not enter as a constituent into the vege- 

 table substances, such as starch, sugar, &c., which plants yield in the 

 greatest abundance, and of which their stems chiefly consist. But the 



