432 
PROFESSOR C. H. LEES: THERMAL AND ELECTRICAL 
Results of Electrical Conductivity Experiments. 
The following tables of resistivities at different temperatures embody the results of 
the observations:— 
Silver Rod. 
Aluminium Rod. 
Ag = ‘999. 
Density at 21° C. = 10'47. 
Temp., 
H. 
scale. 
Resistivity, 
ohm per 
centim. cube. 
Temp., 
H. 
scale. 
Resistivity, 
ohm per 
centim. cube. 
°C. 
°C. 
- 21 • 3 
1•684x10- 6 
- 109-0 
0-880 x 10-e 
-176-1 
0-456 
- 102-5 
•923 
- 178-1 
•455 
- 98-6 
•942 
- 178-5 
•453 
- 54-9 
1-236 
-178-3 
•472 
- 52-8 
1-239 
-177-9 
•471 
- 50-6 
1-245 
- 177-6 
•470 
- 13-0 
1-468 
-177-5 
•470 
- 12-0 
1-471 
- 151-2 
•609 
+ 21-0 
1-675 
- 144-9 
•660 
21-0 
1-676 
- 139-2 
•693 
Copper Rod. 
Soft-drawn High-conductivity Copper. 
Density at 23° C. = 8'8 4. 
Temp., 
H. 
scale. 
Resistivity, 
ohm per 
centim. cube. 
Temp., 
h: 
scale. 
Resistivity, 
ohm per 
centim. cube. 
°C. 
2 C. 
- 176-8 
0-375xlO- 6 
-133-4 
0-677 xlO- 6 
- 175-7 
•375 
- 130-3 
•707 
- 173-9 
•384 
- 105-0 
•884 
- 173-0 
•394 
- 102-0 
•909 
- 172-7 
•398 
- 97-0 
•936 
-171-1 
•401 
- 91-1 
•989 
- 159-0 
•484 
- 36-0 
1-365 
- 155-2 
•508 
- 32-7 
1-388 
- 151-2 
•543 
- 17-0 
1-502 
- 143-9 
•579 
- 15-5 
1-506 
- 141-6 
•612 
+ 16-9 
1 ■ 753 
- 136-9 
•637 
16-9 
1-750 
A1 = '99. 
Density at 20° C. = 2'70. 
Temp., 
H. 
scale. 
Resistivity, 
ohm per 
centim. cube. 
Temp., 
H. 
scale. 
Resistivity, 
ohm per 
centim. cube. 
° C. 
+ 21-1 
20-7 
- 181-5 
- 178-3 
- 169-3 
- 162-2 
- 153-9 
- 146-6 
2-97 x10® 
2-97 
0-623 
•645 
•711 
•782 
•885 
•978 
° C. 
-113-3 
- 108-9 
- 103-0 
- 40-5 
- 36-0 
- 35-0 
- 33-9 
+ 12-2 
1-356 x 10 -6 
1- 415 
1 -480 
2- 256 
2-301 
2-301 
2-305 
2-86 
Zinc Rod. 
Pure Redistilled. 
Density at 21° C. = 7'10. 
1 
Temp., 
H. 
scale. 
Resistivity, 
ohm per 
centim. cube. 
Temp., 
H. 
scale. 
Resistivity, 
ohm per 
centim. cube. 
° C. 
0 C. 
4- 18-8 
6-30 x10~ 6 
-66-9 
4-41x10- 6 
- 180-3 
1-699 
-62-9 
4-46 
- 179-2 
1-732 
-24-7 
5-36 
- 174-6 
1 • 833 
-20-3 
5-48 
- 171-5 
1-931 
- 17-6 
5-52 
- 168-4 
1-96 
+ 16-7 
6-30 
-168-2 
1-96 
18-8 
6-34 
- 116-3 
3-26 
47-8 
6-99 
- 107-0 
3-50 
51-7 
7-09 
- 99-7 
3-69 
54-3 
7-14 
- 87-2 
3-93 
90-3 
8-01 
- 78-6 
4-14 
90-0 
8-03 
- 70-1 
4-32 
88-8 
7-99 
