354 Miss S. C. M. Sowton. On the Reflex Effects in 



of refined clay, the brushes being moistened with normal saline. The 

 current of injury was compensated in the usual way. In the exciting 

 circuit, the Du Bois Reymond induction coil was supplied by a single 

 Daniell cell, the stimulating electrodes were of platinum wire, and had 

 an extra loop of wire (Hering's pattern) to guard against unipolar 

 effects. 



Frogs of the Esculenta species were used ; they were cooled, i,e., kept 

 for six or seven days on ice to ensure a high degree of excitability. 

 The frog was prepared with as little loss of blood as possible, the brain 

 above the medulla being destroyed by insertion of a small peg of wood. 

 For experiments under head I, the frog having been firmly secured, 

 the two sciatics were exposed, cut at the knee-joint, and isolated in 

 their full extent. The nerve of one side was then raised, supported by 

 a glass hook, and connected at transverse and longitudinal surfaces 

 with the galvanometer electrodes the hook was so arranged as to 

 obviate any possible shifting of contacts. The sciatic of the opposite 

 side was then also raised, and its lower end laid across the stimulating 

 electrodes. In one or two preliminary experiments, one branch only 

 of the sciatic was divided at the knee and led off to the galvano- 

 meter, the other branch being left in connection with its muscles to 

 serve as a control ; under these conditions, on stimulating the sciatic of 

 the opposite side, the electrical and muscular effects corresponded, both 

 sometimes failing to appear. 



Currof Inj. 

 its neg. v&r. 



