476 



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



Table VI. — Effect of Heat and Cold on Gastrocnemius. Stimulation 

 Indirect. Maximal. 



No. 



Weight. 



Temp. 



Length of 

 latency. 



Length 

 of curve. 



Altitude. 



Remarks. 



1 



10 grms. 



17° C. 



2-9 



d.v. 



16-5 d.v. 



22*5 mm. 





2 



5 „ 



4 -7 



)> 



33-25 „ 



22 -0 „ 





3 





6 „ 



4 *5 



}> 



32 -5 „ 



22 -0 „ 





4 





7 „ 



4 *25 



39 



31 5 „ 



22*0 „ 





5 





8 „ 



4 - 05 





29-75 „ 



210 „ 





6 





9 „ 



4 -4 



33 



25 -0 „ 



21 -0 „ 





7 





10 „ 



3 -85 



" 



23 -0 „ 



21 -0 „ 





8 





11 „ 



3 - 75 



35 



22-0 „ 



20 '0 „ 





9 





12 ,, 



3 5 



}> 



21-25 „ 



19 -5 „ 





10 





13 „ 



3 35 



33 



20 -0 „ 



19 -0 „ 





11 





14 „ 



3 -25 





18-25 „ 



19 „ 



Cooling below 12° 



12 





15 „ 



3-2 





17-25 „ 



20 -0 „ 



causes a perma- 



13 





16 „ 



2-9 





15-25 „ 



22 -0 „ 



nent shortening. 



14 



)> 



17 „ 



3 -0 



33 



13 -4 „ 



22 -5 „ 



The length of the 



15 



33 



18 „ 



2-85 





13-0 „ 



23-0 „ 



active curve only- 



16 



)) 



19 „ 



2-85 





12 '5 „ 



21-0 „ 



given. 



17 



)f 



20 „ 



2-8 





12-4 „ 



26-0 „ 



18 



33 



21 „ 



2 75 



33 



3) 

 33 



25-0 „ 





19 



33 



22 „ 



2-7 



35 



24-0 „ 





20 



33 



23 „ 



2-7 



33 





24-25 „ 





21 





24 „ 



2-5 



}} 



12 25 



24-25 „ 





22 





25 „ 



2-30 



35 



12-25 „ 



24-25 „ 





Let ns examine the nature of the changes corresponding to our 

 variations in temperature. 



17° 



2-9 



15° 



less 



•05 



5 



47 or +1-8 



16 



?• 



•3 (?) 



6 



less '2 



17 



more 



•1 



7 



•25 



18 



less 



•15 



8 



•2 



19 



■>•) 



•o 



9 



•05 



20 



5) 



•05 



10 



•15 



21 



53 



•05 



11 



i 



22 



35 



•05 



12 



•25 



23 



55 



•o 



13 



•15 



24 



33 



•2 



14 



•1 



25 



5J 



•2 



From these figures we see that the effect of cooling for equal 

 degrees is greater than is the effect of heating ; that is to say, that 

 while cooling through 8 degrees adds 1 D.V. to the latency, heating 

 through 8 degrees takes only "7 D.V. away from it. The average effect 

 for degree of cold is -00069", that of heat '00048", and could we take 

 an average of the whole 12° through which cooling was carried, 

 the figure would rise to '0007 7", because the addition of every 



