H4 Capt. Parry and Lieut. Foster's 
May. 
Mean 
Time 
Deflections from the line 
of Zero. 
Temp. 1 
£ 
a 
Mean 
Time 
of Obser- 
vation. 
Deflections from 
of Zero. 
the line 
Temp. 
vation. 
Needle No.l. 
Needle No.2. 
Needle No.l. 
Needle No. 2. 
1825. 
A. 
M. 
+ 
1825. 
A. 
M. 
+ 
13th 
h. 
m. 
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