130 



mixtures of probably non-metallic impurities. This conclusion is 

 completely borne out by the above, as well as by the investigation 

 carried out by myself in conjunction with Dr. Holzmann. 



The results obtained by Prof. Thomson show the marked influ- 

 ence of traces of foreign metals on the conducting power of pure 

 copper, which is fully confirmed in our research on the same 

 subject. Professor Thomson's best-conducting alloy has a much 

 higher conducting power than those found by some experimenters 

 for electrotype copper ; but it must be remembered that in all pro- 

 bability the copper had been previously fused, and therefore con- 

 tained suboxide of copper. The fact that electrotype copper may be 

 drawn without having been previously fused is, I believe, generally 

 not known ; Professor Buff of Giessen first drew my attention to it, 

 and stated that he always obtained high values for the conducting 

 powers of electrotype copper when drawn without previous fusion. 

 I can confirm this statement, having tested a great many specimens, 

 and found the values in all cases nearly the same. 



March 7, 1861. 



Major-General SABINE, R.A., Treasurer and Vice-President, 

 in the Chair. 



In accordance with the Statutes, the Secretary read the names of 

 the Candidates for election into the Society as follows : 



Somerville Scott Alison, M.D. 



Alexander Armstrong, M.D. 



Lucas Barrett, Esq. 



Charles Spence Bate, Esq. 



Henry Foster Baxter, Esq. 



Alexander Theophilus Blakely, 

 Capt. R.A. 



Sir Charles Tilstone Bright. 



William White Cooper, Esq. 



Joseph Cubitt, Esq. 



Richard Cull, Esq. 



Henry Duncan Preston Cunning- 

 ham, Esq. 



Heinrich Debus, Esq. 

 Campbell De Morgan, Esq. 

 Thomas Rowe Edmonds, Esq. 

 Alexander John Ellis, Esq. 

 James Fergusson, Esq. 

 John Braxton Hicks, M.D. 

 Thomas A. Hirst, Esq. 

 The Rev. Abraham Hume, D.C.L. 

 Henry Letheby, B.M. 

 Waller Augustus Lewis, Esq. 

 A. Matthiessen, Esq. 

 Henry Maudslay, Esq. 

 J. Clerk Maxwell, Esq. 



