Solid ionic conductors and fused salts were electrolyzed without contact of solid electrical leads. The current was carried to the materials to be electrolyzed either by means of electrons emitted by a hot filament or by a glow discharge. The materials were made the separating wall between the anode and cathode compartments of an apparatus constructed of glass or fused silica. Electrolysis of glass produced a white opaque material which did not seem to differ chemically from the original glass. Dendrites of several metals were obtained in the glow discharge electrolysis of fused salts. The results of the latter process resembled conventional electrolysis with metal electrodes and was not similar to the glow discharge electrolysis of aqueous electrolytes.

p l a t i n g s o l u t i o n , prepared with beryllium dimethyl and decaborane, y i e l d e d dark grey, coherent d e p o s i t s containing 85% t o 90% beryllium. A t y p i c a l b a t h c o n s i s t e d of methylmagnesium c h l o r i d e , A similar beryllium KEY WORDS: Magnesium, e l e c t r o d e p o s i t i o n of; Beryllium, e l e c t r o d e p o s i t i o n o f ; nonaqueous p l a t i n g b a t h s ; Grignard r e a g e n t s ; Beryllium dimethyl; Beryllium a z i d e ; Beryllium thiocyanate, decaborane; t r i e t h y l b o r o n ; Organic p l a t i n g b a t h s .

A method utilizing a novel technique to designate the end-point of a diffusion controlled electro-reducible or -oxidizable reaction has shown promising analytical capability. The apparatus consists of a J-shaped, evacuated glass tube in which a column of electrolyte is suspended under tensile stress in the longer limb. One electrode is sealed into the top of the J and the other into the short limb. The formation of a minute amount of gas at the upper electrode by electrolytic discharge of hydrogen or oxygen causes the column of electrolyte to suddenly drop. It has been found that, in the constant-current electrolysis of a suitable supporting electrolyte containing an electroreactive ion, the transition time required for the column to drop is a function of the concentration of the ion. The use of this method as an analytical tool and its relationship to chronopotentiometry are discussed.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 138.251.14.35 Downloaded on 2015-05-22 to IP

A procedure based on the negative pressure of water has been used as a sensitive indicator for the study of electrochemical phenomena. The apparatus consisted of a vertical glass tube, closed at the upper end, which was evacuated and filled with an electrolyte. The latter remained suspended in the column in a metastable state of tension. The column of electrolyte was dropped by producing a minute amount of electrolysis between an indicator electrode sealed in the top of the column and a companion electrode which could also be at the top or in the reservoir at the bottom of the column. The time or current required to drop the column was used for making the following experiments and/or observations: (A) The decomposition potential of water was determined by observing the lowest applied voltage required to drop the column. (B) The time required to drop the column (on passage of a constant current) was proportional to the concentration of iodide ion in the electrolyte. (C) The current required to drop the column was proportional to the area of the indicator electrode, regardless of the irregularity of its shape. (D) The formation of the gas required to drop the column occurred in less than 15 µsec after closing the circuit.