474 Drs. G. F. Yeo and T. Cash. 



Table V. — Curarised Gastrocnemius. Two small Grove's Elements. 



No. 



Weight. 



Secondary 

 coil. 



Length of 

 latency. 



Length 

 of curve. 



Altitude. 



Remarks. 



1 



10 grins. 



13 '5 cm. 



3-45 d. v. 



19 -8 d. v. 



1 9 



JL 



mm. 





2 





13 -0 



J5 



3 25 



35 



19-8 „ 



1 d. 



" 





3 





12 5 



33 



2 "75 



33 



20-2 „ 



-LD 



33 





4 





12-0 



5» 



2-4 



33 



20-6 „ 



91 







5 





11 -o 



33 



2 3 



33 



20-8 „ 



ZD 







6 





10 



33 



2 25 



33 



20 -0 „ 



27 







7 





9-0 



„ 



2-25 



33 



19 7 „ 



9=; 



" 





8 





8-0 



33 



2 2 



33 



19 7 „ 



9^ 



33 





9 





7 -0 



55 



2 -2 



)} 



20 -0 „ 



9*7 



33 





10 





6-0 



33 



2-10 



33 



20-5 „ 



29 



33 





11 



" 



5 -0 



JJ 



2-25 



33 



does not 



OA 



oU 



33 



The first contrac- 













33 



termiiicite 







tion of this 



12 





4-0 



33 



2 25 





2-6 d. v. 



30 





muscle occurred 



13 





3-5 



J> 



2-4 



33 





28 



33 



at 25 centims. 



14 



5) 



3 



JJ 



2 35 



33 





27 



33 



of secondary 



15 



33 



2 5 





2 3 



33 





26 



33 



coil, and had a 



16 





2-0 



J> 



2 25 



33 





26 



33 



latency of 4 d. v. 



17 





1 -5 



}> 



2-8 



3> 





25 





As curve is in- 



18 



33 



1-0 



33 



2-85 



33 





25 



33 



distinct up to 



19 



33 



0-5 



3> 



3-65 



3) 





20 



33 



20 centims. La- 





















tency is omitted. 



20 



33 







33 







lasting con- 



16 



33 



Muscle dies at 















traction 





last stimulation. 



Our first latency in this chart commences with the secondary coil, 

 13*5 centims. from the primary, and has a value of 3"45 D.V., and this 

 we find at 6 and 7 centims. curtailed to 2*2, the smallest figure recorded. 

 At this point (6 centims.) the curves which have hitherto been of 

 fairly equal lengths, though of increasing altitude, show a consider- 

 able elevation after the active phase of contraction is over, the lever 

 pen failing to reach the abscissa for some time after the plate has 

 passed. The stimulation is still increased and the muscle remains 

 longer contracted, whilst the curve falls in altitude ; a stage of irrita- 

 bility which lasts till the secondary roll has passed 1'5 centims., and 

 which is attended with short though varying latencies, passes, and 

 after a sudden and extensive prolongation of the period, the last shock 

 delivered with the coil " home " kills the muscle completely, the last 

 latency being 3*65 D.V. We have here, then, a case in which the 

 violence of the shock at last employed, kills the muscle and death is 

 preluded by a distinct lengthening of latency, so that we cannot 

 ascribe the changes of the earlier part of this series to morbid pro- 

 cesses, any more than the shortening of those of the table last con- 

 sidered, though the strength of the shock when the coils were nearly 

 approximated was no doubt very great. We conclude, then, that the 

 length of the latency is largely influenced by the strength of stimula- 



