GLOBULE AS AFFECTED BY CALVING. 215 



globules, so much so as to suggest a division into 

 two classes, as if two different globuled milks had 

 been mixed. 



If the measurement of 100 globules of the cream 

 may be taken as giving an indication of an average, 

 we had 24 globules larger than 6750", and 76 

 globules of that size and smaller, a proportion of 

 about 1 to 3. The proportion of butter in the re- 

 sults of the two churnings was about 1 to 3J, a cor- 

 respondence sufficiently close to be suggestive, and, 

 taken in consideration along with the microscopic 

 investigation of the butter-milk, offers the explana- 

 tion that the larger globules principally furnished 

 the butter of the first churning, while the smaller 

 globules were the principal factors in producing the 

 butter in the second churning. 



The experiment can be verified in a very simple 

 way by shaking some milk in a clean white glass 

 bottle. After a short time specks of butter will be 

 seen adhering to the glass, the product of the break- 

 ing of the large globules, while it may be a long 

 time before the butter will appear in the ordinary 

 acceptance of practice. 



Another consideration in the study of the globule 

 is the effect of the distance of the cow from calving, 

 on the size. As a constant result with me, the fur- 

 ther from calving the smaller the globule, and I 

 think the more uniform the sizes. 



EXPERIMENT V. 



The milk of the same cow at various periods from 

 calving : 



