THE FARMER'S MAGAZINE. 



composition, and the probable changes they undergo in the 

 animal economy : 



Production of milk by cows— average 14 quarts per day 

 each, for 27i weeks, = 16,072 quarts, which, at 41 oz. 

 per quart, = 41,184lbs. lbs. 



When dry or free from moisture 



5,230 



Butter in 16,072 quarts, at 30 per 1,000 1,235 



Casein „ 48-2 „ 1,977 



Sugar of milk I,f504 



,,. , r Phosphate of lime 99 1 oii 



■Minerals I Qfj^g^ 115/ ^^* 



Gain of weight, SOOlbs., of which I com- 

 pute 



349 



SOOlbs. as fat. 

 2001bs. as flesh. 



500 



Nitrogen 3161bs. 



Phosphate of lime 99 



Phosphoric acid 45*50 



Cost of food per cow per week 8s. 6^d.* 



Gross return in milk 16s. 4d. 



„ weight 1 6 



„ manure 2 8 



20 6 



ANALYSIS OF MILK, BY HAIDLBN. 



Water .; 873- 



Butter 30- 



Casein 48-2 



Milk sugar. 43-9 



Phosphate of lime 2'31 



Magnesia "42 



Iron -07 



Chloride of potassium 1'44 



Sodium and soda 'G6 



1000-00 

 Manure, 881bs. per cow per day. 

 For 6 cows per day, 5281bs., = 3,6961bs. per week. 

 „ for 27^ weeks, 101,0281bs,, containing: 



Of nitrogen 4141bs. 



phosphoric acid 393 



potash 585 



Nitrogen incorporated in food 8831bfl. 



Casein 316* 



Fibrin 7*35 



Manure 414* 



Balance consumed in perspiration . . 150-65 



888001bs. 



6,230 



The materials of food are shown to have cost.. £70 Os. 9d. 



Gross value, 16,072 quarts of milk, at 2d. per qt. £133 18 8 



Gain of weight, SOOlbs., at 6d. per lb 12 10 



£ s. d. 

 Nitrogen in manure, 4141b3., ==■ 



Ammonia, 4941bs., at 6d J2 7 



Phosphoric acid, 3931bs., at l^d. 



perlb 2 9 1 



Potash, 5851bs., at 3d. perlb 7 6 3 



_____ 22 2 4 



£168 11 

 Manure per cow per day, 881bs. ; per week, 6161bs., con- 

 taining : _ s- d. 



Ammonia, 31bs 1 6 



Phosphoric acid, 2-401bs 3^ 



Potash, 3-571bs 10^ 



Value of a cow's excrement, per week. . 2 8 



ANALYSIS OF EXCREMENT, BY PROFESSOR WAY 



Moisture Per Cent. 84-85 



Phosphoric acid '39 



Potash "SS 



Soda '22 



Other substances 13-96 



100- 

 Nitrogen -41, = ammonia -49. 

 The analyses of the chief ingredients of my own produce, 

 or such extra materials as I usually purchase, have been made 

 by Professor Way ; for other materials I have bad recourse to 

 a very useful compilation by Mr. Hemming (vol. xiii., p. 449, 

 of the Society's Journal,) and to Morton's " Cyclopaedia of 

 Agriculture." The analysis cf straw is that of oat-straw ; that 



• When the yield of milk is less, the cost of food is reduced 

 to 78. 8d. per week. 



