160 



PROCEEDINGS OF THE ACADEMY OF 



[1888. 



seen that by this particular method the proportion of X : R : : AS 

 : S B obtains as when the round compensator is used, the only 

 difference being that in making at once A S = S B, the value of X 

 is inferred from that of R. In conclusion it may be pointed out 

 that while the resistance offered by the human body to the passage 

 of an electrical current is very great in astate of health, it appears 

 to be diminished in a state of disease, notably in Graves disease, in- 

 deed so much so as to constitute an important diagnostic symptom 

 of that condition. 



Tabulated results of resistance offered by muscle and nerve of a frog 

 to a current of electricity. 



Muscle. 



Sartorius, length and breadth 2 cent, thickness 1 millim. Resist-^ 

 ance of 70 ohms offered by pads including shields in each case 

 deducted from result. 



Formula for experiments X : R 



1st Series 

 Longitudinally X : 2000 



Longitudinally X : 4000 



Longitudinally X : 5000 



: A S : S B, X = Resistance 



[in ohms. 

 478 : 512, X = 1836 

 318 : 682, X = 1795 

 271 : 729, X =:. 1788 



Mean 14779 



Ratio of mean longitudinal to transverse resistance as shown by 



1st series of experiments 1 to 6-5. 



Ratio of longitudinal resistance to that of mercury taken as unity 



2006000 to 1, of transverse resistance 13103000 to 1. 



