182 BIO-CHEMtCAL JOURNAL 



Fig. 2 gives the curve of this experiment showing the same 

 hyperbolic form as the adsorption curve of congo-red, Fig. i. 



FIG. 2 



Since the last values are the most interesting, and if the whole 

 had been plotted out, the final course of the curve would have been 

 on a much smaller scale than in the figure, the first two values are 

 omitted, the curve commencing at the third. The ordinates represent 

 specific conductivities of the extract in gemmhos, the abscissae are at equal 

 intervals. The value No. 6 is obviously an experimental error. In 

 drawing the curve the conductivity of the distilled water used is taken 

 as the axis of abscissae. The position of the other asymptote is not 

 shown since only part of the hyperbola has been drawn, 



Before leaving this experiment I may mention that an attempt 

 was made to re-dissolve the ash and determine its conductivity. A 

 quantity of the gelatin after the last extraction was dried in a toluol 

 oven and weighed cry 5 grams. This was incinerated and the ash 

 redissolved in the quantity of water corresponding to that in which the 



