190-5.] 



Butter Tests. 



487 



taken were: — (1) 30 lb. Shorthorn milk, (2) 30 lb. Jersey milk T 

 and (3) 24 lb. Shorthorn and 6 lb. Jersey milk mixed — that is; 

 80 per cent. Shorthorn and 20 per cent. Jersey milk. The butter, 

 in each was separately determined after the cream had been 

 allowed to ripen two days. These tests were conducted from 

 October 22nd to November 4th, 1903, from February nth to 

 24th, from June 3rd to 1 6th, and from August 25th to Septem- 

 ber 7th during 1904. Each test was conducted on exactly the 

 same lines, so that the four tests are strictly comparable. 



In the following table the total weight of butter made during 

 the fourteen days that each test was in progress is shown, together 

 with the estimated gain from mixing 24 lb. of Shorthorn with 

 6 lb. of Jersey milk before churning, as compared with 

 churning these quantities separately. The weight of butter 

 produced as an average of the four tests and also the average 

 estimated gain from mixing are also shown. On reference to 

 the table it will be seen that the estimated gain from mixing 

 varies widely, being so little as i'6 oz. of butter at the first test, 

 and as much as 1 lb. 3 oz. at the second test, the average gain 

 from mixing being 9 oz. In every case, however, there is. 

 some gain from mixing, which would naturally vary according 

 to the period of lactation of the cows under experiment and 

 other varying factors met with in the course of the year : — 



No. of 

 Test. 



Date of Test. 



Total Weight of Butter in 

 Lb. and Oz. 



Gain from 

 mixing. 



Shorthorn. 



Jersey. 



Mixed. 



2. 



3- 

 4. 



Oct .-Nov., 1903 

 February, 1904 

 June, 1904 

 August, 1904 



Lb. Oz. 



ia \\ 



16 0 

 15 14 



17 Hi 



Lb. Oz. 

 25 Ili 



22 1| 



23 12 

 25 10J 



Lb. Oz. 



19 Hi 

 18 6^- 

 17 12* 



20 1% 



Lb. Oz. 

 r6 

 13 

 S'3 



IO-2 





Average of all Tests ... 



16 l§J 



24 5 



19 0 



9 



During the total period that the four tests were in progress 

 76 lb. of butter were obtained from the mixed milk, and this 

 showed a gain of 2 lb. 4 oz. of butter, resulting from the mere 

 process of mixing together two different milks, or a gain of 

 about 3 per cent. ; that is to say, in a dairy where 100 lb. of 



