242 ORIGIN AND NATURE OF LIFE 



which is concerned in regulating osseous 

 growth, the posterior portion secretes a 

 hormone which has a somewhat similar action 

 to the suprarenal, but feebler and differently 

 evoked, As has recently been shown by 

 Schafer, it also stimulates the secretion 

 both of the kidney and of the active mammary 

 gland. 



In addition to these remarkable chemical 

 sympathies of the ductless glands, other 

 glands in the body possessed of ducts such as 

 the pancreas, which produces a powerful 

 digestive secretion, also are found to possess 

 internal secretion. Thus, ligature of the 

 duct of the pancreas so as to stop the action 

 of its secretion, does not cause death. The 

 work of digestion is performed vicariously 

 by other secretions. As much as two-thirds 

 even of the gland and the duct may be 

 removed without producing serious symptoms. 

 But, if the remaining third be removed, 

 or if the total gland has been removed in the 

 first instance, then death within two or three 

 weeks, from the severest form of diabetes, 

 is the invariable result. 



In severe diabetes in man, the pancreas 

 is often found diseased, although milder 

 diabetes may result from other causes. 



These results demonstrate that the pancreas 



