﻿Colloids 'produced by Electric Endosmose. 551 



at different times after completing the circuit : the displace- 

 ment is fairly constant in a given case, and is greater the 

 higher the voltage and the longer the time that has elapsed 

 before using the tube. 



At the cathode a yellow colour (positive dilatation parallel 

 to the tube axis) spread slowly out to meet the yellow line 

 from the anode ; for small voltages the action was stationary 

 before meeting had taken place. At meeting the line was 

 often destroyed by a wave or mass of liquid running along 

 the side of the tube. Afterwards movement and colour- 

 change became irregular. The tubes kept their colours; the 

 cell-walls had become solid through loss of water. An old 

 used tube tried with higher voltage showed only small and 

 slow changes. After the current had been passing some 

 time, there appeared at the cathode shreds of gelatine and 

 the water grew turbid ; with the microscope numerous 

 hexagonal crystals were to be seen at this end of the tube. 

 The speed with which the yellow line moved into the tube 

 was measured by reading off its distance from the positive 

 end of the tube on a glass scale placed beneath the microscope 

 slide ; the figures in two cases are given in Table II. The 









Table II. 









228rolt; 2r=V4 



: mm. 



433 volt; 2/-M 



mm. 



T. 



s. 



s yr. 



T. 



s. 



sTT. 







mm. 





/ 



mm. 





6 













6 o 











25 



1 



24 



22 



4 



436 





40 



2 



60 



42 



6 



51-6 





57 



3 



9-0 



I 



8 



640 



1 



21 



4 



12-0 



27 



10 



666 





47 



5 



143 



2 "o 



12 



720 



2 



20 



6 



154 



43 



14 



71-3 





57 



7 



163 



36 



16 



71-4 



3 



37 



8 



174 



4 4 



17 



70-8 



4 



22 



9 



18-7 



33 



18 



733 



5 



11 



10 



19-3 



5 5 



19 



72-0 



6 



10 



11 



19-6 



41 



20 



70-6 



7 



12 



12 



20-0 



6 18 



21 



696 



8 



17 



13 



20 3 



7 



22 



69-1 



9 



24 



14 



20-8 



40 



23 



69=0 



10 



39 



15 



21-1 



8 22 



24 



694 



13 



21 



17 



217 



9 47 



26 



71-8 



15 



47 



18 



206 



10 42 



27 



68-4 



16 



15 



19 



22*2 



11 37 



12 32 



28 

 29 



67-2 

 673 





(s 2 T) = 21-0 





(.< 2 T)=70-2 







sVTV = 0-5] 





sVyTV= 0-49 





2 2 



