ANIMAL AND VEGETABLE 255 



all events from two symmetrical parts of the chest and back. 

 Whatever the hand reaction was the body deflections 

 would all be lower, because of the resistance interposed not 



to Caiva nosneter 



250*%, rapid 



Fig. 143. 



only by nerve-substance but by sebaceous glands and fat 

 cells, and in no case would the light, under normal con- 

 ditions, exhibit a rapid movement upon the scale. In the 

 above illustration we have obtained deflections of 80 mm. 

 slow upon the unaffected, and 250 mm. rapid upon the 

 affected side, and have found the rate of travel increase as 

 the electrode touched the skin on the centre of the spot of 

 "least resistance." That would,, with a galvanometer of 

 the sensibility I have described, postulate semi-acute 

 inflammation and indicate a fairly high local temperature, 

 but in a very acute case the light would be seen to fly off 

 the scale. 



In double pneumonia there would be a short-circuit 

 between the two lungs, or the affected parts of them, and 

 the path of least resistance, common to both lungs, might 

 be from the left lung or the right, to the skin. 



These remarks apply to galvanometric observation of 

 all forms of local pyrexia. As regards the exact internal 

 position of the fault, the deflections should, theoretically, 



