232 Proceedings of Royal Society of Edinburgh. 
r 
L 
SESS. 
For effect of changing Poles of Induction Coil. 
Time. 
Az. of 
Light. 
Obj. 
Obs. 
Pole. 
Microm. 
Reading. 
h. m. 
5 0 p.m. 
S. ; 
D 2 
Pos. 
916 
6 1 „ 
? 5 
D 2 
Neg. 
914 
Therefore no 
sensible effect. 
5 2 „ 
D 2 
Pos. 
914 
For effect of long continued interval of Time. 
Time. 
Az. of 
Light. 
Obj. 
Obs. 
Microm. 
Reading. 
1 
Temp. 
h. m. 
4 40 p.m. 
5 55 ,, 
7 0 ,, 
8 23 ,, 
10 13 ,, 
12 45 ,, 
S. 
’ ? 
5 ? 
D 2 
D 2 
D 2 
D 2 
D 2 
D 2 
915 
914 
916 
914 
915 
913 
0 
64*7 
64-4 
64-0 
63*5 
62-8 
61*9 
Therefore no 
effect worth 
noticing. 
15 Royal Terrace, Edinburgh, 
May 25, 1882. 
( Issued separately July 18, 1902.) 
