THE BEEAST 



61 



THE BREAST 



The dimensions of tins region are more especially interesting on account 

 of its width, which by many is regarded as an indication of the size and 

 capacity of the chest. This, however, both observation and dissection have 

 proved not to be the case. The distance between the two first ribs varies 

 but little in animals of the same variety and size, although the actual width 



Fig. 47. — Narrow Breast 



-1- - l;n..Ml l;n:i^t 



of the breast may present very considerable differences in the same speci- 

 mens. The cause of this discrepancy will be found in the varying size of 

 the muscles, especially these which unite the fore extremity to the sternum 

 or breast-bone. When these are largely developed the pectoral region is 

 full, deep, and broad, and still more so if a.ssociated with general obesity. 

 When from any cause such an animal is made to waste as a consequence 

 of disease or indifferent food, a difference in the transverse diameter soon 

 becomes apparent. It is not, however, to he understood that the size of 

 these muscles, and therefore the width of the brea.st, bears no relation to 

 the respiratory capacity, for " dense and vigorous muscles recjuire a spacious 



