40 Mr. W. A. Jolly. Reflex Times in the 



shows, after the initial deflections, other oscillations which are absent from 

 the record of a twitch : thus, for example, in fig. 4 there is a series of three 



Fig. 2. 



Fio. 3. 



Figs. 2 and 3. — Electrical variations evoked reflexly from tire muscles of the hind-limb 

 of the spinal frog by mechanical stimulation (hammer tap) of the same-side toes. 

 The wicks of uon-polarisable electrodes are applied over the skin at knee and ankle. 

 The upper line is the shadow of a tuning-fork vibrating at the late of 200 D.V. per 

 second. The middle line is the shadow of the string of the galvanometer. The 

 lower line is the signal, giving the moment of tapping the toes. The curves are to 

 be read from left to right. All are somewhat reduced in size. 



« '.. - „ - — „ 



i_X— — zz 



Fig. 4.^ — Electrical variation evoked reflexly from the muscles of the hind-limb of the 

 spinal frog by tapping the heteronymous toes. Time marker and signal as in 

 figs. 2 and 3. 



