MILCH-KINE. 44& 



6th EXPEKIMENT. 



240 DAYS AFTER CALVING. 



The forage here consisted of the full allowance of hay, or 33 lbs. 

 In the preceding experiment the milk, which had hitherto kept up to 

 from about 9| to 10^ pints a day, fell suddenly to little more than 

 8 J pints. To ascertain whether the fall was owing to the potato 

 regimen or not, the cow was returned to the ration of hay, mider 

 which in the Ist experiment the daily average of milk was 9.3 pints. 

 In the course of thirty days 188 pints of milk were collected, at the 

 rate of 6.2 pints per day. The declension in the quantity secreted 

 consequently cannot be ascribed to the potatoes which were given 

 in the fourth experiment. 



6th EXPERIMENT. 



270 DAYS AFTEB CALVING. 



The ration here was raw potatoes, with salt and straw — the ration 

 of the fourth experiment, with the addition of about 2^ oz. of salt. 

 The animal ate this salted ration with appetite ; she also made away 

 with the whole of the chopped straw, and it agreed well with her ; 

 nevertheless, the milk continued to decrease in quantity ; it had 

 failed oflf to 5.9, say 6 pints a day. 



7th EXPERIMENT. 



290 DAYS AFTER CALVING. 



In this trial the ration consisted of Jerusalem potatoes equivalent 

 to 33 lbs. of hay, under which the milk may be said to have remain- 

 ed stationary, though it was above rather than under the 6 pints per 

 diem as in the 6th experiment. In composition it was as follows : 



Caseum 8.3 ) 



fuTofn„ii-.:-.-.v.v.v.".v..::;: ti sond.m 



Ashof Caseum 0.2 j 



Water 8T.5 



100.0 



The quantity of the milk had obviously decreased from the first 

 down to the two last experiments ; but its chemical constitution 

 does not appear to have varied during the entire course of the trials ; 

 the varied regimen has had no influence on the proportions in which 

 its several ingredients are encountered. But there was still one 

 point to be ascertained, viz. : whether the milk secreted very shortly 

 after the delivery differed from that which was formed at a period 

 remote from that epoch. 



8th EXPERIMENT. 



A cow which had calved twenty-four dajrs before, and, upon a 

 mixed regimen of hay and green clover, was giving at the rate of 

 18.6 pints of milk a day, was brought under observation. Analysis 

 showed this milk to consist of : 



Caseum 8.0) 



^^o,-;^:::::::::::::::::: II ^"^^^ 



Ash of caseum 0.2 j 



Water 88.8 



100.0 



38* 



