ON ELECTEOLTSIS IN ITS PHYSICAL AND CHEMICAL BEARINGS. 411 



Current stopped because boundary -was getting indistinct. This did not seem a 



very good experiment, but it is better than some here unrecorded which preceded it. 



August 26. — A similar experiment -with a drop of phenol-phthallein added to 



liquid in tube, because its indication is sharper. Boundary, however, still sloping, 



and therefore unsatisfactory to read. 



Plottings in Fig, 16. 



Further eaperiments on the 

 meeting of Ba and SO^ in 

 jelly tubes. 



It may be remembered 

 that, whereas in fi-ee liquid 

 Ba appeared to travel about 

 three times as fast as SO^, 

 the precipitated plug of 

 BaSOj nearly always ap- 

 pearing much nearer the 

 Na^SO^ or cathode end of 

 the tube than near the BaCl.> 

 end, yet in jelly tubes they 

 appeared to travel at about 

 the same rat«, the plug of 

 precipitate forming near the 

 middle of the tube. To 

 make sure that there was 

 no error of observation here, 

 and to see if constitution of 

 jelly affected the matter, a 

 few experiments with jelly 

 tubes were repeated, and 

 different strengths of jelly 



T.1 i.- o , . ., were used. 



Plottmg of the last four tables. ^^^^^^ 24.-Two tubes, 



each 40 centimetres long, were filled with jelly made by dissolving 40 grammes 



