138 REPORT—1890. 
The value given by Salvioni in his paper (‘ Rendiconti della R. Ac- 
cademia dei Lincei,’ vol. v. fasc. 7) is ‘95404. Owing to a mistake in cal- 
culation, in consequence of which a correction was applied with the 
wrong sign, the value sent to him from Cambridge for his B.A. standard 
was in error by ‘0005. When this is corrected his value becomes °95354, 
thus agreeing very closely with the others. Salvioni’s value in line 11 is. 
obtained through a coil of Strecker’s. 
Fifth Report of the Committee, consisting of Professors FITZGERALD: 
(Chairman), ArmstronG and O. J. LopcEe (Secretaries), Sir 
WiLLi4M THomson, Lord Ray.ricu, J. J. THoMson, SCHUSTER, 
PoyntinG, CruM Brown, Ramsay, FRANKLAND, TILDEN, HARTLEY, 
S. P. Taompson, McLeop, Roperts-Austren, Ricker, REINOLD,. 
Carey Foster, H. B. Dixon, and Joun M. Tuomson, Captain 
ABNEY, Drs. GLADSTONE, HopKINSON, and FLEMING, and Messrs. 
CROOKES, SHELFORD BIDWELL, W. N. SHaw, J. Larmor, J. T. 
Bottom ey, R. T, GLAZEBROOK, J. Brown, and E. J. Love, ap- 
pointed for the purpose of considering the subject of Electrolysis 
in its Physical and Chemical Bearings. 
Durine the past year the following communications bearing on the 
subject of electrolysis have been published by members of the Com- 
mittee :— 
Mr. W. N. Shaw: ‘ On the Relation between Viscosity and Conduc- 
tivity of Electrolytes.’ (‘ Proc. Camb. Phil. Soc.’ November 1889.) 
In this communication Mr. Shaw criticises the observations and con- 
clusions of Wiedemann concerning the intimate connection between 
electric resistance and ordinary viscosity in liquids, and of the independ- 
ence between ionic migration and electric endosmose. He quotes an 
observation of Kohlrausch, showing that when fused silver iodide solidi- 
fies there is no discontinuous change of conductivity at the melting-point. 
He further examines how far the precise ionic velocity, calculated by 
Kohlrausch and verified by Lodge, can be reconciled with the view of 
electro-decomposition by help of complex molecular aggregates, as 
opposed to the simple view of free or dissociated atoms; and concludes. 
that the molecular-aggregate theory may turn out capable of explaining 
all the known facts. 
Mr. A. P. Chattock has kindly translated for the Committee an 
abstract by Dr. J. Gubkin, from Professor Warburg’s laboratory (Wiede- 
mann’s Annalen, 32, page 114), ‘On the Electrolytic Separation of Metal 
at the free surface of a Salt in solution.’ The translation is printed 
below. 
Electrolytic Separation of Metal at the free Surface of a Salt in Solution. 
By Dr. J. Gupxin. 
1. When a current of electricity passes from the solution of a salt into a vapour 
or a gas, electrolytic separation of the metal must occur at the surface of the liquid. 
At the suggestion of Herr Warburg I have made one or two experiments to determine 
how the separation of metal takes place in such a case. 
ee 
eee 
