ON ELECTROLYSIS IN ITS PHTSICAL AND CHEMICAL BEARINGS. 399 



On the 15th the state of tube II. was this : 



Fiti. 6. 



c 



BaSO, 



Tube J£ Bee. 15. 



'\\BaCl3 



A small arrow marks the place of first appearance of the ring in fig. 5. 

 The distances are as follows : — 



II. III. IV. V. 



19^0 17-5 30-5 45-8 

 BaCUend 66-7 69^5 54-7 40-7 



Distance from Na.jSO^ end 



December 15, 7 p.m. — Vessels same as in last experiment, hut tubes arranged 

 II. and IV. in series, one pair, and III. and V. in series, the other pair. 



Current strength in II. and IV. from -0095 to •0044 ; and in III. and V. from 

 -0062 to -0022. 



By December 16, 4 p.m., deposit showed itself in tube IV. 



December 17, 10 a.m., ring formed in tube IV., and almost complete in II. An 

 indication in V. By 3 p.m. the ring in V. was complete, and a slight deposit in 

 tube III. 



On December 20 ring complete in III., and current stopped. 



Fig. 7. 



{^ Na. SO.p 



^ 



BaClt 



BaSO^. 



{^(jTubeJT nlX 35 BccJT 



Sako^ 



^Na2S04, 



(C 



Tube V alXr. d.5 Vec.lt 





Distances of ring when first formed — 

 in tube II. 



from NaoSO, end 21-5 



„ BaClo end 64-5 



III. 

 17^1 

 69-8 



IV. 



28-6 

 56-4 



V. 



24-3 

 62-2 



Gauging of the tubes. 

 January 6, 1886. — Determined bore of tube by filling them with mercury at 



12° 0. 



