138 REPORT—1862. 
Composition of alloy. Weight. Length 764 mm. ; diameter 0:553 mm. 
te agienoicel tee Conasetng Homer 
Galdvxs godt 7-4 7. Found. 
Made from pure metals. 11:0 45-591 
Hard-drawn. 55°5 40-333 
100: 37-560 
A= 44-472 —0:081525¢ + 0-00032408. 
This alloy was taken to see the effect such a combination would have. 
Length 244 mm. ; diameter 0°682 mm. 
(4) Platinum .. 66°6 Conducting power. 
Iridium .... 33-4 ip Found. 
Commercial alloy. 12-0 4-506 
Hard-drawn. 56-0 4-384 
100-0 4:271 
A=4-541 —0-0029307¢+ 0:000002724¢, 
This alloy was tried as it possesses very great elasticity and does not become 
softer on annealing. On account of these properties, as well as its permanency 
in air (not oxidizing on its surface), it would serve exceedingly well for 
making springs and contacts for electric and telegraphic apparatus. 
Length 381°5 mm. ; diameter 0-451 mm, 
(5) RUPEE sw aie so cn0 95:0 Conducting power. 
Figen 5... 56 5:0 T. Found. 
Made from pure silver and 12:0 31:173 
commercially pure platinum. 56:0 29-550 
Hard-drawn. 100:0 28-068 
A=31-640 —0:039363t+ 0:00003642¢. 
This and the following two alloys were taken as they probably contain 
chemical combinations. 
Length 708 mm. ; diameter 0:26 mm. 
(6) DILVEr . a.» stat 90-2 Conducting power. 
Platinum -2)-e2e 9:8 T. Found. 
The metals employed were the 9:0 17:920 
same as in No. 5. 54:5 17319 
-Hard-drawn, 100-0 16°767 
A=18-045—0-013960¢ + 0-00001183#. 
Length 169 mm. ; diameter 0-408 mm. 
(7) rol Cr are ere 66:6 Conducting power, 
Platinum ~..... 33°4 T. Found. 
Commercial alloy. 8-270 6°6850 
Hard-drawn. 54:00 65826 
99-90 64987 
A=6-7032—0-0022167¢+ 0-000001394¢, 
a 
In the following Table I have given the results insuch a manner that 
they may be easily compared. 
