Or crc >£- CO 
ON THE ELECTRICAL PROPERTIES OF PURE SULPHUR. 
137 
append a short table giving the relation between temperature and resistance, by way 
of supplement to the general table of results. 
Table XY.—Voltage, 280 volts. 
Time. 
Temperature. 
Double deQection in scale division. 
Remarks. 
Not taken 
o 
31 
1 division = 4'9 X 10 -13 ampere 
44 
53 
3 ., (after 5 minutes) 
All effects marked 
60 
5 5 : 5 5 55 
5 5 5 5 
68-2 
10 55 5 5 5 5 
5 5 5 5 
73-4 
5 5 5 5 
72 
Difference due to temperature ? 
72 
^0 55 5 5 5 5 
After keeping at 72° for 
10 minutes 
3 hrs. 17 mins. 
82 
86 „ „ „ 
4 „ 6 „ 
84 
105 „ „ ,, 
4 „ 35 „ 
81-8 
109 
5 „ 4 „ 
8L2 
no 
5 „ 13 „ 
8L8 
108 ,, 
72 
90 
Cooling slowly 
71 
120 
7 hrs. 
71-8 
100 
Re-lieated slowly (not slow 
enougli ?) 
Fig. 4. 
