132 MANURE. 



Or per year, 



4400 lbs. of geine, 



71 " of bone dust, . 



37 " of plaster, 



37 " of lime, marble, or chalk, 



24 " of common salt, 



15 " of sal enixen, or sulphate of potash. 



These are equal to One cow, or a cord of green 

 cow dung, pure as dropped, would be formed, daily, 

 by 108 cows. A cord of dung weighs 9,289 lbs., 

 which -f- 86 lbs. == 1 cow, = 108 cows. And one 

 cow daily produces in excrements, salts of lime suf- 

 ficient for half a bushel of corn. 



190. Multiply the quantity produced by one cow, 

 by the number of cows kept, and it may easily be 

 calculated, how much salts and geine, are annually 

 applied to soil, in this form. This is better done, 

 than the estimate by cords or loads. The manure 

 from one cow is a definite comprehensible quantity, 

 and it may be expressed by saying, that one cow is 

 spread per acre. 



191. Estimating the nitrogen as ammonia, the 

 yearly product of one cow is 155 lbs. of nitrogen 

 equal to 188 lbs. of pure ammonia, or equal to 550 

 lbs. of carbonate of ammonia of the shops. A sin- 



