158 Dairy Management. 



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 had recourse to a 

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

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

 ture.' The analysis of straw is that of oat-straw ; that of green 

 food is derived from the analysis of rape-plant, cabbages, and 

 kohl rabi. During February and March I have been using 

 wheat and barley-straw with mangel, and as these materials con- 

 tain less oil, I give in the steamed food three ounces of linseed 

 oil per day to each animal. For the composition of milk I 

 adopt that by Haidlen, whose method of analysis is reputed to 

 be the most accurate, the proportion of butter in my milk being 

 this season very similar to that given by him. 



It will be observed that this is the gross return for 27i weeks 

 from the time of calving, from which will have to be deducted 

 expense of attendance, &c, 



£. s. d. 



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



The value of these materials as manure consists of 888 lbs. 



nitrogen = 1061 lbs. ammonia at G(^ 26 10 6 



Phosphoric acid and potash 915 4 



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



The 16,072 quarts of milk, at 2d. per quart for new milk, 

 at Avhich price it enters largely into consumption as 

 food for man, amount to £133 18 8 



£. s. d. 

 The nitrogen in the milk 316 lbs. = ammonia 



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



Phosphoric acid in ditto 455 lbs. at lid. 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 converted into food fitted for the 

 use of man represents a value thirteen to fourteen times greater 

 than it wovild 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 rather than enricli his manure-heap. 



The calculation of casein in milk is based upon the supposi- 

 tion that my milk is equal in its proportion of that element to 



