384 



Dr. A. D. Waller. 



[Mar. 17, 



and after congelation 50,000 ohms at 14°. At the temperature of 

 - 6° of the cooling chamber a sudden electromotive discharge of 

 + 0*0080 volt took place. The responses to excitation of +0*0040 

 and + 0*0080 previous to congelation, were abolished in consequence 

 of congelation. 



Sources of Fallacy — Doubtful Cases. 



In ordinary cases (i.e., with healthy skin a few hours after removal 

 from the body) and with ordinary care, the results of experiment are 

 unmistakable, and there is no room for doubt. A clear, positive 

 response of more than 0*01 volt, to single shocks of both directions 

 and to alternating currents of both pairs of directions, is proof that the 

 skin is living. 



But at later periods, and in cases of skin obtained from the^os^- 



Voltage of Response of Human Skin after Excitation by Induced 









Single break current. 



Tetanisation for 5 seconds by 







Plate 

 No. 



Time. 



10000. 



1000. 



5000. 











+ (out- 

 going). 



-(in- 

 going). 



f make — ) 

 [ break + ) 



( make + ") 

 (.break — ) 



( make — ") 

 t break + j 



< make + ~i 

 \ break — ) 





No. I. Skin of am- 

 putated leg 



4187 

 4188 

 4189 

 4190 

 4192 

 4193 

 4194 

 4195 



4196 



4197 



3hrs. 



+0-0005 



+0-0010 







- 









6 brs 

 2nd day 

 3rd 



4th 



5th \\ 



9th " 



+0-0020 

 +0-0005 

 -0 -0002 



-o-oooi 



+ 0-0005 



-o-oooi 



-o-oooi 

 -o-oooi 



—trace 



+0-0025 

 +0-0010 

 + 0-0004 

 + 0*0001 

 + 0-0010 

 + 0-0001 



+ 0-0001 

 + 0-0002 

 + trace 



+0-0030 

 + 0-0020 

 +0-0010 



+0-0010 



+0-0010 

 nil 



+ 0-0020 



__ 



+0-0003 

 + 0-0005 



+0-0020 



-0-0005 

 + 0-0006 



-o-ooio 





No. II. Skin of am- 

 putated breast. 



4197a 



4198 

 4199 

 4200 



l£ hrs. 



3 "„ 

 5 „ 

 51 „ 



+0*0180 



+0-0230 



+0-0440 

 +0-0040 



+0-0460 

 +0-0080 



+0-0300 

 +0-0120 

 +0-0004 



+0-0200 

 +0-0092 

 -0-0004 







4201 



8 „ 



+ 0*0022 



+0-0044 







+ 0-0100 



+0-0090 







4203 

 4204 

 4205 

 4206 

 4207 



4213 



21 "„ 



22 „ 



23 „ 

 3rd day 

 4th „ 



5th ",, 

 7th „ 



+0-0050 



+0-0040 

 -0-0010 

 +0-0025 

 —trace 



+ 0-0040 



+0-0175 



+0-0060 

 +0-0005 

 +0-0035 

 + trace 



+0-0050 



+0-0100 

 +0-0126 



+0-0050 



+0-0250 

 +0-0060 



+0-0100 

 +0-0100 



+0-0150 

 +0-0010 









8th „ 



-0-0005 



+0 -0002 







+0-0013 



-0*0011 





No. in. Skin of ab- 

 domen. 



4208-9 



4210 

 4212 



6 hrs. 

 2nd day 



3rd day 

 4th „ 



+0-0040 

 —trace 

 +0-0011 

 +0-0023 



+0-0080 

 + trace 

 + 0-0021 

 t 0-0053 



+0-0012 

 + 0-0007 



+0-C009 

 + 0-0040 









