722 ANNUAL REPORT OF NEW- YORK 



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 enrich his manure-heap. 



The calculation of casein in milk is based upon the supposition 

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

 analysed 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 casein. 



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. 



£i s. d. 



The abstraction of nitrogen in the milk is computed at ' 



316 lbs., value, _. 9 9 



The abstraction of phosphoric acid in the milk is com- 

 puted as 48 J lbs., 5 8 



Either the rape-cake or bran alone suffices for the restoration 

 of the phosphoric acid. 



The amount of phosphoric acid in the manure is 393 lbs., be- 

 ing about 16 per cent of the whole ash or mineral matter. The 

 ash of meadow-hay contains about 14 percent; that of rape-cake, 

 30 per cent; bran 50 per cent; malt combs, 25 per cent; 

 tui'nips, &c., 10 per cent of phosphoric acid. 



The amount of potash in the excrement is 616 lbs., being about 

 25 per cent of the whole ash or mineral matter. The ash of 

 meadow- hay contains about 20 per cent; rape-cake, 21 per cent; 

 malt combs 37 per cent; turnips, (various,) 44 per cent; from 

 which it may be inferred that the sample of excrement sent to 

 Professor Way for analysis, did not contain more than a fair pro- 

 portion of these ingredients. 



To ascertain the quantity of excrement, the contents of the 

 tanks into which the cows had dropped their solid and liquid ex- 

 crement during five weeks, were weighed, and found to be 500 

 cwt., 2 qrs., lbs., from 18 cows, being 88 lbs. per cow per day. 

 The sample for analysis was taken from that which the cows had 

 deposited within the preceding 24 hours. This was collected in 

 the mud cart, well blended, and sent off quite fresh. 



