A MICRO-ELECTRODE. 133 



to press, to find that Taylor 1 devised an accurately controllable 

 micro-pipette, that seemed to fulfill the requirements of the 

 apparatus needed for injection and extraction. I believe that by 

 soldering plantinum wire into the capillary containing the mer- 

 cury and connecting it to batteries, comutator and coil, that it 

 will answer equally well for electrical stimulation. 



1 Taylor, C. V., Science, 1920, June 18. 



