CONSTITUTION AND TEMPERATURE ON MAGNETIC SUSCEPTIBILITY. 
121 
constructed was slightly paramagnetic, and the variation of its susceptibility with 
temperature is represented in fig. 7, Curve I. In this figure the ordinates are 
deflections in millimetres, and are proportional to the forces acting on the phial at 
any temperature. The abscissae are temperatures in divisions of the thermocouple 
scale (T). Some of the observations are given in Table I. 
Table I. 
-T. 
Deflection (cfi). 
-T. 
Deflection (cfi). 
-T. 
Deflection (di). 
483 
- 103-0 
246 
-53-5 
159 
-43-0 
469 
-102-5 
239 
-52-5 
152 
-42-5 
447 
- 95-0 
231 
-52-0 
142 
-40-9 
404 
- 82-0 
225 
-51-0 
133 
-39-7 
355 
- 71-5 
212 
-48-8 
125 
-38-5 
322 
- 65-5 
201 
-48-0 
113 
-36-2 
288 
- 58-5 
193 
-47-0 
93 
-35-5 
264 
- 56-0 
180 
-45-5 
8 
-28-0 
254 
- 54-3 
165 
-43-6 
0 
-27-5 
The current was adjusted to 8'6 amperes for each observation. Weight of phial 
= U223 gr. 
The corresponding observations when the phial was filled with nitrobenzene are 
plotted in fig. 7, Curve II. Some of the observations are given in Table II. 
Table II. 
-T. 
Deflection (d). 
-T. 
Deflection ( d). 
-T. 
Deflection (d). 
275 
38-0 
115 
54-0 
19 
63-0 
257 
39-7 
97 
56-0 
17 
64-0 
248 
40-7 
89 
57-0 
13 
65'5 
205 
44-7 
80 
57-8 
11 
67-5 
192 
46-0 
70 
58-7 
9 
70-5 
180 
46-7 
65 
59-0 
7'5 
72-5 
171 
48-0 
59 
59-7 
1 
76-0 
160 
49-0 
51 
60-0 
_ 2 
76-0 
153 
49-8 
40 
60-9 
182 
47-0 
142 
51-5 
35 
61-8 
173 
48-0 
130 
52-7 
30 
62-0 
353 
25-2 
122 
53-4 
23-5 
62-5 
349 
24-5 
The current was adjusted to 8'6 amperes for each observation. Weight of phial 
and nitrobenzene = 2'2 7 3 gr. 
T = 0 corresponded to atmospheric temperature, 16° C. 
It will be seen that the curves are approximately parallel until a point corresponding 
to the temperature 5° C. is reached, which is the melting-point of the crystals. It 
appears, therefore, that the liquid is more diamagnetic than the crystals. By 
VOL. CCXIV.-A. R 
