34 ELEMEXTAKY PHYSIOLOGY. [l. 



4. Take of the sciatic or other large nerve a piece 

 about 10 m.m. long and place it in about 10 c. c. 

 of ammonium bichromate 2 p. c. In a week 

 renew the ammonium bichromate ; in this fluid 

 it may be kept until sections are required, or in 

 a month or more it may be washed with water 

 and placed in spirit as in 2. 



