1904.] of the Gall Bladder of the Frog. 441 



Envelope of Gall Bladder. 



S.s. 5000+ = -0-0020 

 = +0-0030 



Mucous side. Serous side 



B C A 

 ,8.8.. 5000 + -- 



+0-0047 

 -0-0053 



nil 



-> 



nil 



^ - -0-0020 

 ^ +0-0012 



Bladder ew^re (June 10). 



S.s. 5000- = +0-0075 -0-0087 



+ -0-0150 +0-0125 



1000+ -0-0020 



- +0-0013 



5000- +0-0125 -0-01*10 +0-0010 



+ -o-oioo +0-0100 



Portion of envelope only, with electrodes placed one on mucous, the 

 other on serous side. 



S.s. 5000- +0-0007 

 + -0-0031 



+ 0-0012 

 + -0-0010 +0-0003 



+ 0-0015 



+ 0-0015 

 + -0-0014 



Slice of Gall Bladder Envelope (July 12). 



S.s. coil at 5000 + = - 0-0030 

 - = +0-0030 



