T/ie Demarcation Current of Mammalian Nerve. :\ 1 



Experiment C. Sciatic Nerve of Cat. 

 Similar experiment. Solution used 0-9 gramme per cent. NaCl. 



Taking the three experiments and examining the variations in the 

 specific resistance in each case, it is noticeably least affected in the 

 0-75 per cent, solution^ which therefore, from this point of view, most 

 nearly approaches the " isotonic solution." 



Reducing the data from the three experiments to an assumed 

 average value of 200 ohms for the inital resistance, we have 



or, taking averages from the five determinations made after immersion 

 in the solution, 



The alteration in weight in the three experiments is apparently 

 anomalous, as there is an increase in each case, and judged from this 

 criterion alone, none of the solutions are isotonic. Considerable care 

 was taken to dry off the superficial moisture, and as far as possible 

 the precautions were the same in each case. There is a difference in 



