VOL. XXXI.] 



PHILOSOPHICAL TRANSACTIONS. 



519 



Sir I. NeiOtons Table of the Refractions of the Stars for their Apparent 



Altitudes. 



The Variation of the Magnetical Compass, observed by Capt. Rogers, in the 

 Pacific Ocean. With some Remarks on the same. By Dr. Halley. 

 N°368, p. ]73. 



Having lately had the opportunity of perusing Capt. Woods Rogers's original 

 journal, who in 1709-IO traversed the great South-Sea, or Pacific Ocean, I 

 was highly pleased to find the care he had taken to set down the variations of 

 the magnetical compass, in his passage from the South Cape of Calefornia, to 

 the Island of Guana, being about 7 hours or 105 degrees of longitude. This 

 might have been long since expected from Capt. Dampier, who had three times 

 made the tour of the world, and thrice gone this very same track. 



It is to be wished that the French, who have had frequent opportunities to 



