438 



Mrs. A. M. Waller. On the "Blaze-currents" [Dec. 1, 



In this experiment some of the responses from the anode are 

 homodrome. A single shock with coil at 5000- gives -0-0015 

 from the anode. The stronger excitation with coil at 10000 calls 

 out the antidrome response + 0*0065 and then the homodrome response 

 from the anode - 0*0022, and then the weaker excitation at 5000 

 gives the same responses in a lesser degree + 0-0015 -0-0007. 



Same Gall Bladder separated from Liver. 

 B C A Kesponse. 



Coil at 5000 



-0-0050 +0-0040 



-0-0020 +0-0025 



-0-0007' +0-0015 



Envelope 



5000+ = -0-0004 +0-0003 

 = +0-0006 



10000- = +0-0008 

 + = -0-0006 



Liver (April 30). 



5000- = +0-0010 

 + -0-0020 



10000+ = -0-0036 

 - = +0-0026. 



Gall Bladder alone. 



5000 - + 0-0250 Then sinks to - 0-0080 



+ - 0-0100 + 0-0050 Sinking back to - 0-0040 



+ 0-0250 -0-0100 



+ -0-0050 +0-0060 



Slice of envelope gave no response. 

 Contents of gall bladder gave no response. 



It is a very easy matter to demonstrate the blaze-currents on the 

 frog's gall-bladder, because the organ can be separated and placed 

 between electrodes without injury ; but it is a difficult matter to cut 

 out a piece of the round bladder and place it on electrodes without 

 injuring the delicate tissue. It is necessary, however, to do this in 

 order to study separately the mucous and serous surfaces. I found 

 the most convenient procedure was to cut the bladder across with 

 scissors, the bladder collapses, but the piece cut off rests on the blade 



