400 APPENDIX. — HORSFALL'S SYSTEM. 



calving, from which will have to be deducted expense 

 of attendance, etc. 



£. s. d. 

 The materials used for food are found to have cost . . 70 9 



The value of these materials as manure consists of 888 



lbs. nitrogen = 10G1 lbs. ammonia, at 6rf.,. . . 26 10 6 

 Phosphoric acid and potash, 3 15 4 



Value of food if employed as manure, . . . £36 5 10 



The 16,072 quarts of milk, at Id. per quart for new 

 milk, at which price it enters largely into con- 

 sumption as food for man, amount to £133 18 8 



The nitrogen in the milk 316 lbs. = ammonia £.5. d. 



378 lbs., at 6d. per lb., 9 9 



Phosphoric acid in ditto. 45£ lbs. , at l^d. per lb. , 5 8 



£9 14 8 



From these statements it will be seen that materials 

 used as food for cattle represent double the value they 

 would do if used for manure, whilst that portion con- 

 verted into food fitted for the use of man represents a 

 value thirteen to fourteen times greater than it would 

 as manure. 



It then appears clear that it is for the feeder's profit 

 to use his produce as much as possible as food for 

 cattle, with the view to convert it with the utmost 

 economy into food for man,, and thus increase rathei 

 than enrich his manure-heap. 



The calculation of caseine in milk is based upon the 

 supposition that my milk is equal in its proportion of 

 that element to that analyzed by Haidlen. Several 

 analyses by other chemists show a less percentage, 4 to 

 4.50. As my cows are adequately supplied with 

 albuminous matter, I have a right to presume on their 

 milk being rich in caseine. 



The loss of nitrogen by perspiration, 150.65 lbs., is 

 nearly 17 per cent. Boussingault found a loss of 13.50 

 of nitrogen in a cow giving milk. 



The abstraction of nitrogen in the milk is computed at £.5. d. 



316 lbs., value, 990 



The abstraction of phosphoric acid in the milk is com- 

 puted at 48£ lbs. , 058 



