382 Miss S. C. M. Sowton. Ohservations on the 



Exp. 2. — Nerve 2. Stimulation by single break induction shocks. 



Coil 

 distance. 



Position 

 of rest. 



J^egative 

 variation. 



Back 

 swing. 



Yalue of r> 1 



Back swing + or — . 



neg. var. 



5 em. 



52-5 



50-7 



52 -5 



-18 i .. 







49 



47-2 



48 -8 



-1-8 i 



-0-2 



cm. 



45 



13 -4 



41-9 



-1-9 i 



1 



-01 



Stimulation by ten shocks, alternate make and break, at half- 

 second intervals. 



41 I 26-2 ! 41 5 -14-8 ^Oo 



47 5 ! 38-4 1 47-4 ; - 9-1 .. -0 1 



' i I : 



Exp. 3.— February 21, 1899. Pike, 4^ lbs. Nerve II. Momentary 

 mechanical stimulation by cutting. 



Position 

 of rest. 



Negative 

 variation. 



Back 

 swing. 



Value of 

 . neg. var. 



Back swing -r or — . 



88 -5 

 86-6 



86-8 

 85-2 



87 



very slow 

 return 



-1 -7 

 -1-4 



:: I-.- 



Exp. 4. — March 6. Pike, 4 lbs. Nerve II. Stimulation by cutting. 



1 48 



i 44 



5 



50 



-3 -5 



+ 2 





1 40 



1 



j 36 



"2 



41 



-3-8 



+ 1 





Exp. 5. — ^larch 8. Pike, 5J lbs. Nerve II. Stimulation by cutting. 



48 , 46 49 



Through the kind co-operation of Dr. Siegfried Garten, Assistant 

 in the Leipzig Laboratory, I was enabled to make observations with 

 the capillary electrometer on the response of the olfactory nerve to 

 single stimuli. The photographic records of three such observations 

 are given below. The curves as reproduced are rather less than half 

 their original size : they read from left to right. The negative varia- 

 tion appears as an upward movement of the mercury meniscus. 



cm. 



1 



+ 1 



