474 EDITOR'S NOTES. 



ments at the following stations, which are here ranged 

 according to their latitudes: 



To these twelve stations, of which ten are in south and 

 two in north latitude, we must add London and Green- 

 wich, where the pendulums were vibrated by Captain 

 Foster before his departure from England, and the 

 vibrations' repeated (in London) by Mr. Baily after the 

 return of the instruments at the conclusion of the voyage. 

 Having completed the experiments at Porto Bello, the 

 last of his pendulum stations, and whilst engaged in 

 measuring the difference of longitude across the isthmus 

 between Panama and Chagres, Captain Foster was acci- 

 dentally drowned in the river Chagres, on the 5th of 

 February, 1831. The papers containing his observations, 

 arranged but not calculated, were placed by the Admi- 

 ralty in the hands of Mr. Francis Baily, President of 

 the Koyal Astronomical Society, under whose directions 

 the necessary calculations were made, and the results 

 reported in a memoir forming the seventh volume of the 

 Transactions of the Royal Astronomical Society. 



Captain Foster was furnished with two invariable 



