1902.] On Skin Currents. 387 



Currents of a Berne Coil, supplied by 8 Leclanche Cells (11*5 volts) — continued. 



alternating currents. 



( make + ) 

 ( break — ) 



iua ke + j. 



\ break 



Conduc- Resist- 

 tivity. ance. 



(Not corrected for gal- 

 vanometer and elec- 

 trode resistance.) 



+0-0120 

 +0-0087 

 +0 -0075 



+0-0100 



+ 0-0025 



+0-0050 



+0-0035 



+0-0010 

 + 0-0018 

 + 0-0012 



-0-0080 



-O-0005 

 +0-0005 



+ 0-0090 

 + 0-0030 



10, 40 

 200 

 50, 80 



20, 30 



75, 160 



28, 62 



125, 300 



f 1666667 

 4 1000000 

 t 500000 

 250000 



r ioooooo 



\ 250000 

 50000 



r 200000 



t 125000 



/ 500000 



I 333333 



f 133333 



t 62500 



/ 357143 



t 161300 



r f-oooo 



t 33333 



Normal current = -0*0180. 

 single shocks and tetan. 



Normal current = +0*0100. 



Conductivity increasing by 



Fat removed. Normal current = +0"0060. 



+0*0050 

 +0*0005 



■0*0040 

 •0*0005 



400 

 800 



25000 

 12500 



Boiled. 



+0*0072 



+ 0-0060 



28, 50 



+0*0162 



+ 0-0042 



40 



+ 0*0016 



+ 0-0020 



400 



+ 0*0008 



+ 0*0012 



500 



+ 0-0250 



+ 0-0150 



15, 90 



+0-0030 



-o-ooo I 



300 



+ 0*0004 



-0-0001 



750 



+ 0-0020 



-0-0003 



450 



+ 0-0025 



+ 0-0002 



300, 300 



+0*0168 



+ 0*0038 



150 



+ 0-0090 



+ 0-0010 



160 



+0*0005 



-0-0004 



550 



+ 0-0020 



-0-0010 



125 



357143 

 200000 

 250000 

 25000 

 20000 

 666667 



linn 



33333 

 13333 

 22222 

 33333 

 66667 



80000 



Normal current = —0 -0140. 

 Cancerous tissue gives no response. 



Good response. 



Same piece, boiled. 

 Electrodes alone. 



New electrodes ; same piece of boiled skin. 

 Skin of nipple. 

 Adjacent piece. 

 Ditto, fat removed. 

 Ditto, boiled. 



Skin dead ; putrefaction apparent. 



+0-0116 



+ 0-0020 



90 

 300 



+0-0100 



+ 0*0025 



50, 180 



+0*0032 



+ 0-0073 



150, 200 



+0-0100 

 +0-0017 



-0-0060 

 -0-0024 



100 

 400 



-0-0050 



+0 -0100 



75, 100 



+ 0*0064 



-0-0030 



50, 75 



+ 0-0025 

 + 0-0004 



+ 0-0010 

 + 0-0008 



-0*0008 

 -0*0008 

 ( -0-0002 

 I +0-0005 



-0-0020 



200 

 400 



100 



400 

 150 



mm 



33333 

 200000 

 55556 

 66667 

 50000 

 100000 

 25000 

 133333 

 100000 

 200000 

 133333 

 50000 

 25000 



100000 



25000 

 66667 



An injured piece of skin. 

 Another and better piece. 



Another piece ; doubtful state. 

 Ditto, boiled. 



Another piece ; anomalous response. 



Ditto, an hour later. 



Ditto, boiled. 



The electrodes alone. 



Same piece of skin replaced on same electrodes. 



The electrodes alone. 



Same piece of skin on fresh electrodes. 



+ 0*0300 

 +0-0100 



+0-0100 



-0*0040 



-0*0025 

 -0*0010 



+0*0040 



20, 50 



40, 80 

 80, 120 

 120 

 40 



500000 

 200000 

 250000 

 125000 

 83000 

 250000 



After boiling. 



