TEMPEB ATTIRE ON THE ELECTRIC CONHTJCTINa POAOlR DEIIVIETAES. 
II 
Table IV. 
First wire. 
Second wii-e. 
. . Third wire. 
Hard drawn. 
Annealed. 
Hard drawn. 
Annealed. 
Hard drawn. 
Annealed. 
Length...,,..’. 
Diameter 
2214 millims. 
0'759 millim. 
2200 millims. 
0*759 millim. 
837 millims. 
0*467 millim. 
759*5 millims. 
0*434 millim. 
742*5 millims. 
0*434 millim. 
Conducting power 
found before heat- 
ing the hard-drawn 
wires 
Conducting power 
after being kept at 
100^ for 1 day ... 
Ditto, for 2 days ... 
Ditto, for 3 days ... 
Ditto, for 4 days ... 
Q Eedueed to 0°. 
73*239 at 13*2 76*821 
72*746 at 15*2 76*854 
72*751 at 15*1 76*832 
^ Eedueed to O’. 
72*550 at 15*1 76*561 
73*359 at L2*6 76*733 . 
^ Eedueed to O’. 
67*530 at 36*8 77*229 
71*868 at 19*4 77*223 
71*854 at 20*1 77*405 
72*191 at 19*0 77*457 
72*396 at 18*0 77*394 
The means of the conducting powers found for each of the following temperatures 
were— 
First wire, hard drawn. 
_ Second wrire, hard drawn. 
Third wire, hard drawn. 
T. 
■ 
Conducting power. 
Difference. 
. T. 
Conducting power. 
Difference. 
-T. 
Conducting power. 
Difference. 
Observed. 
Calculated. 
Observed. 
Calculated.’ 
Obs'erved.i 
Calculated. 
15*95 
30*76 
50*06 
69*75 
84*31 
99*27 
72*567 
68*798 
64*392 
60*397 
57*742 
55*248 
72*536 
68*828 
64*410 
60*385 
57*722 
55*263 
1 
4-0*031 ! 
— 0*030 ' 
-0*018’ ! 
4-0*012 
4-0*020 
-0*015 
— 0 
13*36 
24*79 
40*80 
55*65 
69*52 
1 84*12 
100*00 
73*222 
70*329 
66*515 
63*306 
60*528 
57*905 
55*203 
73*212 
70*325 
66*544 
63*312 
60*531 
57*854 
55*232 
4-0*010 
4-0*004 
- 0 * 029 ' 
-0*006 
-0*003 
4-0*051 
- 0*029 
12*44 
23*27 
39*42 
’■ 55*47 
70*56 
84*79 
99-00 
73*854 
70*965 
67*002 
63*441 
60*455 
57*904 
55*635 
73*841 
70*975 
67*013 
63*448 
60*435 
57*893 
55*647 
-f 0*013 
— 0*010 
-0*011 
— 0*007 
4-0*020 
4-0*011 
—0*012 
First wire, annealed. 
Tliird wire, annealed. 
14*92 
30*05 
48*87 
69*90 
82*82 
99*62 
74*020 
70*039 
65*575 
61*220 
58*811 
55 915 
73*992 
70*068 
65*611 
61*191 
58*768 
55*948 
4-0*028 
— 0*029 
-0*036 
4 - 0*029 
4-0*043 
-0*033 
At the commencement of the deter- 
minations this -wire was torn away from 
its place by the stirrer. 
14*10 
26*31 
40*51 
53*72 
70*17 
85*36 
99*30 
74*327 
71*067 
67*582 
64*645 
61*229 
58*422 
56*029 
74*293 
71*095 
67*621 
64*628 
-61*220 
58*388 
56*056 
4-0*034 
-0*028 
-0*039 
4 - 0*017 
4-0*009 
4-0*034 
— 0*'()27 
The formulae deduced from the observations, from which the conducting powers were 
calculated, were — 
For first wire (hard di’awn) . 
For first wire (annealed) 
For second wire (hard drawn) 
A = 76-838-0-27973^+0'0006285f. 
A = 78•161-0•28935^+0•0006664^^ 
X=76-786-0-27549#+0-0005995f. 
For third wire (hard drawn 
X=77-343-0-29043^+0-0007200f. 
For third wire (annealed) 
X=78-231-0-28849^+0-0006564f,. 
The observations made with wire 1 (hard drawn) are given in Table I., those of the 
same wire (annealed) were made in the same manner, 
c2 
