74 



Dr. G. Gore. 



Experiments Nos. 5, 8, 16, 17 (26 ?), 30, and 31. It may be re- 

 marked respecting this, that in the whole of the latter class, one of 

 the solutions consisted either of sodic carbonate, potassic cyanide, or 

 yellow chromate of potassium, whilst in the former class the only 

 experiment in which an alkaline liquid occurred was No. 18. The 

 apparent movement of the mass in some of this latter class has been 

 already partly explained (see p. 68, et seq.). 



With the single meniscus apparatus, the meniscus moved in the 

 direction of the current in Experiment 40 ; and in the opposite direc- 

 tion (with certain variations) in Experiments Nos. 41, 42, and 43 ; 

 whilst in Experiment No. 44, the meniscus moved very slightly. The 

 direction of movement was occasionally reversed during an experi- 

 ment (see Experiments Nos. 41, 42, and 43). In Experiments 

 Nos. 40, 41, 42, and 43, the movements were quick, as if they resulted 

 from pressure. The slower movements have been already partly 

 explained (see p. 68, et seq.). 



In order to ascertain more definitely whether there existed a trans- 

 fer of the body of the heavier liquid due to the passage of the current 

 in the constricted portion of the solution, and also to compare the 

 effects obtained with those recorded of the movement of water by an 

 electric current, as discovered by Armstrong (see " Phil. Mag.," 

 vol. xxxiii, 1843, pp. 194 — 202), and investigated by Quincke and 

 Jiirgensen (see Wiedemann's " Galvanismus, " vol. i, 1872, p. 585, 

 or Miller's " Chemical Physics," 4th Edition, p. 530), I employed the 

 following apparatus, fig. 5. 



A and B are two glass gas chimneys supported by two transverse 

 and perforated pieces of wood C, joined by screws. D and E are two 

 T-pieces of glass tube, similar, open at all their ends, and joined 

 together by means of a very short india-rubber bung F, and kept from 

 separating by means of two binding wires Gr, H. These tubes are 

 fixed tightly in A and B by means of perforated india-rubber bungs I 

 and J, their lower ends being closed by perforated corks K and L, 

 through which pass two very narrow glass tubes M and N, open at 

 their ends, and connected by a long vulcanized india-rubber tubing O, 

 of very small internal diameter (about 2 or 3 millims.). The intended 

 use of the india-rubber tube was to allow of a more ready flow of the 

 liquid in the tube P. The bung F is perforated, and a small glass 

 tube P, open at both ends, fits tightly in it. Q and R are two large 

 electrodes of sheet platinum, with terminal wires S and T connected 

 with a battery consisting of a single series of twelve Grove's elements. 

 The vessels are filled throughout with liquid up to the level of the line 

 U and V (W and X are dotted lines, indicating something which 

 appertains to subsequent experiments). 



In using the apparatus, a liquid was employed containing a very 

 small amount of minute suspended particles of precipitated sulphur, 



