128 REPORT—1863. 
Length 145 mm.; diameter 0-758 mm. 
(4) Golder. oa 85-0 T. Conducting power. 
Hronmys. S32". 15:0 15:0 2-6239 
Hard-drawn. 57°65 2:2732 
100-0 1/9926 
A=2°7645—0-0096586¢+ 0:000019402. 
Length Pat mm.; diameter 0-802 mm. 
(5) VED Are ares ike 6 75:0 ” Conducting power. 
Palladium ...... 25-0 1 ‘0 8:4846 
Made by Messrs. Johnson and 555 8:3577 
Matthey. 100-0 8°2256 
Hard-drawn. 
A=8°5152—0-0027644t—0-000001313#. 
This alloy was formerly used by dentists on account of its elasticity. It 
was tested, as it appeared to answer some of the conditions required. 
Length arn 6mm.; diameter 0:576 mm. 
(6) Cappers. !.63 0% 63:3 Conducting power. 
ANOS SOCIO ATE 36:7 15 73 21:807 
Made from pure metals. 23°7 21:562 
Hard-drawn. 39-28 21-116 
54:38 20°693 
69°31 20-300 
84:63 19°897 
99-43 19-327 
A=22-274—0-030601¢+ 0-000029802?. 
Length 190 mm.; diameter 0:381 mm. 
(7) Copper is euae. 75:0 i Conducting power. 
Wane > ors ees 25-0 13:47 ‘704 
Made from pure metals. 24:07 21-413 
Hard-drawn. 39°21 21-020 
53°65 20-647 
69:03 20-268 
83°71 19-915 
98-97 19-565 
A=22-076—0-028100¢+ 0:00002945?. 
These alloys are given, as they approach in composition to that of brass. 
It seemed very desirable to test the influence of temperature on the alloy, as 
it was proposed by Jacobi as a unit of electric resistance. 
Length eet 5mm. ; diameter 0-524 mm. 
Varstotets te, 3 3 ‘Conducting ower. 
ee ae "97 15:43 19-058 
Made from pure metals. 23:40 11-990 
Hard-drawn. 40°35 11-852 
54:75 11-737 
69-78 11-619 
84:66 11-499 
98-70 11:391 
—=12-186—0:0084168¢+ 0:0000037002, 
