THE NEEVOUS SYSTEM 167 



respect the results obtained eight years ago (1911) 

 by the catheter method." (Cannon.) 



Professor Stewart objects again. One would ex- 

 pect an increased rate of the denervated heart, 

 writes Professor Stewart, when the central end of 

 the sciatic or the peripheral of the splanchnic nerve 

 is stimulated, for "it is obviously dependent upon 

 the better flow through the coronary vessels'' ; and 

 the increased rate of blood flow through the de- 

 nervated heart increases the amount of adrenaline 

 passing a given area in unit time. He objects to 

 the use of any organ in the body as an indicator of 

 adrenal secretion when asphyxia is employed as 

 a stimulus, "because asphyxia may be expected to 

 alter the reactivity of the test object to adrenaline, 

 making it, for example, more sensitive." "We never 

 supposed/' he continues, "that it was possible to 

 use in one observation an asphyxiated test object 

 and in the comparison observation the same object 

 with unobstructed respiration, or to assume that 

 if there was any difference in reactions, it must be 

 due to a difference in the rate of output of adrena- 

 line; the conditions of the test object itself being 

 of no moment." 



When two such redoubtable adversaries as Can- 

 non and Stewart appear in the field, it is not to be 

 expected that either the one or the other can hope 

 for a quick, decisive victory. Both are masters in 



