52 



EXPERIMENTAL PHYSIOLOGY. 



should be thoroughly washed with water and then soaked in 

 isotonic NaCl solution. When in use the ZnSO 4 must not be 

 allowed to spill over as it is injurious to the nerve. 



The boots are held in position by the clips on the horizontal 

 rod of the moist chamber base (Figs. 15 and 16). 



A gastrocnemius muscle, with a long fresh nerve attached, is 



