172 MANURE. 



in proportiou by bulk of 7 liquid to 6 solid, while 

 their actual value is as 2 to 1. 



245. 100 lbs. of cow's urine afford 35 lbs. of the 

 most powerful salts which have ever been used by 

 farmers. The simple statement then, in figures, of 

 difference in value of the solid and liquid evacuations 

 of a cow, should impress upon all the importance of 

 saving the last in preference to the first. Let both 

 be saved. If the liquids contained naturally, geine, 

 they might be applied alone. It is the want of 

 that guiding principle which teaches that salts and 

 geine should go hand in hand, which has sometimes 

 led to results in the application of the liquor, which 

 have given this substance a bad name. 



246. It has been proved that the ammoniacal salts 

 of urine have a forcing power on vegetation. The 

 value of ammonia was long ago understood by Davy, 

 and its carbonate was his favorite application. Plants 

 watered with a simple solution of sulphate of ammo- 

 nia, an abundant salt in cow's urine, are 15 days ear- 

 lier than those watered with pure water. Grass 

 land watered with urine only, yields nearly double 

 to that not so manured. In a garden on land of very 

 poor quality, near Glasgow, urine diluted with water, 

 nearly doubled the grass. But upon wheat, sown 

 on clay land, it did no good ; it injured barley, po- 



