164 MANURE. 



afford about 200 gallons of spent ley. This con- 

 tains the glycerine and salts above, (230) and affords 

 per gallon, 



Geine or glycerine, 1-2 lb. 



~ I ( Muriate of potash, 5 1-3 lbs. 



baltS > I Sulphate of potash, 1 1-3 lbs. 



Silicate of potash, 2 1-2 oz. 



231. The spent ley from soda soap, contains the 

 sulphate and muriate of soda of the soda ash, which 

 rarely amount to 12 per cent. As less salt is here 

 added, the spent ley is less rich in salts. In a boil 

 of 2000 pounds of hard soap, 600 weight of white 

 ash are used. Including the 1 bushel of salt usually 

 added, the spent ley contains, 



Sulphate of soda, 84 lbs. or per gallon, 6 3-4 oz. 

 Muriate of soda, 106" " 1-2 lb. 



Glycerine, 100 " " 1-2 lb. 



232. The value of spent ley has been tested for 

 a series of years. It has shown its good effects on 

 grass lands, for four or five years after its application. 

 There is great advantage in carrying it out upon the 

 snow. It has then the effect of converting any 

 carbonate of ammonia in the snow, into sal ammo- 

 niac, or a volatile into a fixed salt. 



233. When it is thus understood, on what the 

 value of spent ley depends, it would seem probable, 



