no 
Capt. Parry and Lieut. Foster's 
April. 
Mean 
Time 
of Obser- 
Deflections from the line 
of Zero. 
Temp. 
1 April.- 
1 
Mean 
Time 
of Obser- 
vation. 
Deflections from the line 
of Zero. 
Temp. 
vation. 
Needle No.l. 
Needle No. 2 . 
Needle No.l. 
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