76 M. Duperrey's Magnetical Observations, 



of the Society ■'s Isles, from the 24th March to the Slst April 

 1823. 



At Matavai, in the north of the Isle of Tahiti, in May 

 1823, and in lat. 17° 29' 35'' S. and lat. 149° 30' 15" W. the va- 

 riation was 6° 40' 24^/ N.E. and the dip -^O'' l',8. 



At Bozabora, to which the expedition went from Tahiti, the 

 latitude of the observatory was 16° 30' 2" S., the long. 151^ 

 4T 24^' W. and the variation 6° 21' 22" N.E. 



In the voyage from Bozabora to Port Praslin, in New Ire^ 

 land, the following observations were taken. 



At Port Praslin in August 1823, the definitive variation 

 was 6° 48' 27" N.E. and the mean dip of all the needles— 20'' 

 41'.7. The longitude of the observatory was 147** 8' 15" W. 

 and its lat. 4° 50' 37".8 S. 



The following observations were made in the passage from 

 Port Praslin to Offak. 



