^GLOBULE VERSUS GRAIN OF BUTTER. 217 



By including some measurements which were taken 

 from the lower layer of cream, and not incorporated 

 in the above table, we have additional illustration. 



Days from calving, !...., 4580" 



" " 33 6200" 



" " 69 6750" 



" " 135 6720" 



11 375 7660" 



The size and appearance of these globules is varied, 

 as I believe, by the feed of the cow, and certainly, 

 to a considerable extent, by her condition. That 

 their size has a connection with the grain of the but- 

 ter, it is in the power of any one to convince himself 

 by direct experiment. The larger-globuled breeds 

 furnish butter of a stronger grain than do the smaller- 

 globuled breeds, and the first rising from the milk- 

 pan yields also a stronger-grained butter than does 

 the succeeding risings. 



When a cow gets out of condition she oftentimes 

 falls away in her milk very rapidly, and a microscopic 

 examination of her rnilk may show the presence of 

 colostrum corpuscles. In order to understand the 

 signification of this fact, it is necessary to know what 

 colostrum is. 



Writers upon milk have made statements of wide 

 discrepancy. Dr. Bird 3 states that the colostrum of 

 the cow is yellow, mucilaginous, and occasionally 

 mixed with blood ; it contains but mere traces of 

 butter or other fat, and appears to contain albumen 

 as one of its ingredients. This secretion does not 



8 Cooper, Anat. of the Breast, p. 124. 



