

86 



Observations upon the Dip of the Magnetic Needle. 



Nov. 2d, 1839, 



" 9th, 

 Dec. 7th, 



Mean, 



a 



it 



33° 57'-6 

 34° 01/-7 

 34° 04'-7 



34° 0t'-3 



Cape Town, South Africa, station northwest of the Astronom- 

 ical Observatory, the same as that occupied by Capt. Fitzroy of 

 the Beagle. 



a 



a 



a 



it 



April 5th, 1841, No. 3, 



No. 2, 



Mean, . . . . 



April 7th, 1841, No. 3, 



No. 2, . . 



Mean, . . 



Mean resultant, . 



Magnetic observatory, Lieut. Wilmot 

 April 6th, No. 3, 



it 



it 



No. 2, 



Mean, 



s dip-house 



53° 18'-3 

 53° 30'-7 



53° 24'-5 

 53° 43 

 53° 27'-3 



53° 35'-l 

 53° 29'-8 



53° 34'-7 



53 d 33'-7 



53° 34'-2 



Quallah Battoo, coast of Sumatra, on the south bank of the 

 river, near the mouth of a small creek that runs through the vil- 

 lage ; Oct. 6th, 1841. 



No. 3. . 



No. 2, . 

 Mean. . 



9° 11' 



9° 00 



9° 05' -5 



Singapore, magnetic observatory in one of Lieut. Elliot's iso- 



lated observing rooms, Dec. 5th, 1841. 



No. 3, 



No . 2, 

 Mean, 



Macao. ( 



No. 3, 

 No. 2, 



Mean, 



March 



12° 24'-4 

 12° 09-5 



I2°TS 



near the water, north- 



30° 52' 

 30° 53 / l 



30° 52 A 7 



Gardens of the Morrison Education Society] west side of Monte 



Fort. 



