270 Mr. G. Kamensky on the Electric Conductivity 



The holes have sheet-copper disks fixed at the bottom. 

 Each cup is large enough to admit of the insertion of three 

 stout copper terminals. Figures 1 and 2 below show how the 

 arrangements are made for connecting the three threes in 

 parallel, for verification, and for connecting the three threes 



flus one in series, when using them for testing a 10-ohm coil, 

 n both figures the letter c denotes a connecting bar of stout 

 copper. 



Fig. 1. 



Fig. 2. 



j^^CT^^^Tn^ 



e 



WM\ 3 jMf 3 PpB 





hTTYI f ft 



^B 



My thanks are due to my assistant, Mr. Colman C. Starling, 

 Demonstrator in Physics in University College, Bristol, for 

 having zealously aided me in working out the methods of 

 adjustment described above. 



XXXI. Note on the Electric Conductivity and other Properties 

 of the Copper- Antimony Alloys. By GEORGE KAMENSKY, 



Assoc. Royal School of Mines*. 



IT is remarkable that the physical constants of the alloys of 

 copper and antimony have hitherto been but little ex- 

 amined, more especially as the series is a very striking one ; 

 and the so-called " Regulus of Venus," which was well known 

 to the alchemists, stands out prominently, with its beautiful 



* Communicated by the Physical Society, having been read June 23, 

 1883. 



