64 LAB OR A TORY G UIDE IN PH YSIOL OGY, 



(13) Put the central end of the nerve into NaCl 0.6 % 

 and gradually add salt to saturation. Take another 

 preparation, put the nerve into a few drops of 

 NaCl 0.6 %. Add alcohol drop by drop until the 

 mixture is about 90 / alcohol. Record results. 



