42 
MR, S. W. J. SMITH ON THE THERMO MAGNETIC ANALYSIS OF 
Meteoric Iron (1st Winding). 
First Experiments. 
N umber 
of experiment. 
Temperature. 
135-5 
(H = 0-475) C.G.S. 
0 c. 
J 
r a 
16-5 
1-615 
i 
J 
158 
1-54 
j 
' c 
272 
1-515 
i 
L d 
464 
2-29 
e 
678 
4-37 
ry 
717 
1-52 
9 
752 
0-26 
i 
h 
816 
— 
589 
0-13 (H = 0-71) 
Jc 
15 
1-56 
l 
621 
4-58 
m 
669 
4-71 
n 
551 
2-96 (H = 0-54) 
At the point numbered h, temperature 816°, the induction throw had become 
imperceptibly small. The current was lowered gradually, causing gradual fall of 
temperature, and observations were made continuously to find when perceptible 
ferromagnetism reappeared. There was a perceptible throw, when the resistance 
showed a temperature of 591°, corresponding to a permeability, on the above scale, 
of 0'05. At 589° the permeability was approximately 0T3 for a field strength of 
071 C.G.S. units. 
The experiment n was not strictly comparable with the others, as the apparatus 
had been partially dismantled in the month intervening between this experiment and 
that numbered m, 
Meteoric Iron (1st Winding). 
Later Experiments. 
Number 
9 
Number 
9 
of 
Temperature. 
135-5 
of 
Temperature. 
135-5 
experiment. 
(H = 0-475) C.G.S. 
experiment. 
(H = 0 - 475) C.G.S. 
1 
°C. 
12 
2-065 
I 
r 10 
° C. 
173 
1-73 
J 
r 2 
174 
1-805 
1 
L 11 
388 
1-695 
1 
L 3 
315 
2-025 
[12 
102 
1-715 
J 
r 4 
463 
2-01 
13 
247 
1 • 655 
1 
L 5 
574 
3-60 
1 
.14 
286 
1-675 
J 
r 6 
12-5 
1-91 
J 
r is 
336 
1-68 
1 
7 
310 
1-985 
1 
L16 
305 
1-655 
J 
r 8 
461 
2-055 
I 
r 20 
14 
1-80 
1 
9 
572 
3-50 
1 
121 
309 
1-715 
