VALUE OF COW MANURE. 345 



FOOD SUPPLY TO Six Cows DURING 191 DAYS, AND ITS COMPOSITION. 



Here the cost of the food was $311.09, or 27 cts. per day 

 for each cow a pretty large price for keeping but the 

 milk (16,000 quarts), at two pence (3.7 cts.) per quart, 

 amounted to $592, leaving the handsome margin of $281, 

 or $46.83 per cow. "We may consider this a pretty high 

 price for milk, but it is only equal to $1.44 per 100 Ibs. a 

 price dairymen often reached at cheese factories with high 

 prices. 



VALUE OF Cow MANUKE. 



But one important consideration of profit which an 

 English farmer never forgets, but which an American 

 farmer often leaves out of his estimate of profit, is the 

 manure. Mr. Horsfall sent to the laboratory of Prof. Way 

 samples of the manure from these six cows, while the 

 experiment was going on, for analysis. According to his 

 analysis of several samples, these cows produced, during 

 191 days, the following amounts : 



Pounds, Cts. Value. 



Nitrogen 414 20 $ 82.80 



Phosphoric acid 393 



Potash . 



585. 



12 47.16 



8... . 46.80 



Total value, at commercial prices $176.76 



