of Edinburgh, Session 1885-86. 
947 
3. On Amagat’s Manombtre d Pistons libres. 
By Professor Tait. 
4. On the Electrical Properties of Hydrogenised Palladium. 
By Professor Knott. 
5. Electro-Chemical Eeactions between Metals in fused Salts. 
By Thomas Andrews, F.Pt.S.E., E.C.S., Wortley Iron 
Works, near Sheffield. 
Electro-Chemical Reactions between Metals in fused Salts . — The 
present communication contains some results of a furthur study of 
electrical reactions at high temperatures in fused salts. 
The interchanges of electro-chemical position between such metals 
as platinum and copper and platinum and iron in fusing salts, 
noticed by the author, led to an investigation as to the effect on 
the metals of varied intensified temperature in different parts of the 
same fusing salt. 
A number of repeated experiments were conducted as follow : — 
A salt was maintained at its fusing-point in a state of quiet lique- 
faction in a large flat-bottomed platinum crucible, the ends of two 
platinum wires A and B (0063 inch diam.) cut from the same 
piece, were immersed in the fusing salt, and the other extremities 
were connected with an astatic galvanometer of known resistance 
and constants. Whilst the salt was in this condition of even fusion 
no current w 7 as produced. On increasing the temperature of one 
To Galvanometer 
Fig. No. 1. 
portion of the fusing salt, in some cases where allowable, by a 
powerful blowpipe blast applied just under the ehd of the platinum 
