604 PROFESSOR MACGREGOR AND DR KNOTT ON 
TABLE ITI. 
Resistance. 
Temperature. 
Observed. | Calculated. 
TG6SSC: 3°465 3°465 
55:0 3510 SOLE 
74-6 3°535 3°5345 
95:2 3500 3°5585 
1153 3580 35816 
135°4 3°605 3°6043 
1539 3°625 3°625 
From these determinations we deduce the formula : 
R=3°44486 + :001232¢— 00000042’, 
whence 
7r=1+:00035764¢— -000000116127’, 
and 
k=1— 000357642 + 000000244032. 
With the last we may compare MatTrTuiEessEN and Voet’s formula for an alloy 
of the same metals, 23°28 per cent. of whose volume is palladium : 
k=1—:00032391¢ + 000000154217. 
BEnoirT gives the following as the formula for palladium between 100° and 
860° C. 
r= 1+ °002787¢t— 0000006117’. 
Again therefore the alloy’s rate of variation is less than that of either of its 
constituents. 
Table IV. contains the measurements of another alloy of silver and pal- 
ladium, 20 per cent. of which by mass and therefore about 18°85 per cent. by 
volume is palladium. 
TABLE IV. 
Resistance. 
Temperature. 
Observed. Calculated. 
id: 0; 2:033 2:0314 
Bore 2:047 2:0457 
589 2:068 2:0679 
71:0 2:078 2:0780 
90°1 2:092 2:0934 
110°5 2112, 2:1096 
125°3 pp 21211 
136°5 2:129 21257 
146°2 2157 2:1370 
1564 2144 2°1446 
