224 Mr. V. H. Veley. Examiiiation of Physical and [Nov. 23, 



inspection of figs. 3 and 4 that not only the coixrse of abolition, hut also 

 of recovery, are much more regular in the case of trichlorethylene than in the 

 case of chloroform. Accordingly exact measurements were made of the 

 amount of response expressed in millimetres, the outlines for the purpose 

 being copied out on squared tissue paper. 



Sal 



llttlllHIIIIII1Wlif"'<'"i"i""'»''''"""- 



i ' i ' ' ' ' i ' ' i ■ i ' ■ i ' i i ' ■ i i ' ' ' i i i i i i i 



Fig. 4. 



Taking, then, these heights in the course of abolition as a measure of the 

 action, whether chemical or otherwise, of the trichlorethylene and chloroform 

 respectively on the isolated muscle, the results are as set out below. In 

 the first column are given the times in minutes from start ; in the second, 

 fourth, and sixth columns tlie observed heights in millimetres ; in the third 

 the values calculated from equation Ax/A^ = constant = 1 ; and in the fifth 

 similar values from equation Ax/A.t = constant = 1"5. The rate of chemical 

 change would, of course, be the recijjrocals of these numbers. 



I. 



Trichlorethylene. 



Chloroform. 



II. 



III. 



IV. 



V. 



VI. 



VII. 



0 



18 



17 



20 



20 



15 



15 



2 



10 



15 



17 



17 



14 



10 



4 



13 



13 



13 



14 



13 -5 



1 5 -5 



6 



11 



11 



11 



11 



12 



13 -5 



8 



9 



9 



7 



8 



10 



10 



10 



7 



7 



5 



5 



0 -5 



5 



12 



6 



6 



2 



3 



3 



3 



14 



4 



3 



2 



1 



1 



2 



10 



3 



1 







1 



1 



18 



2 









0 -5 



0-5 



20 



2 









0-5 



0 -5 



