ADVERTISEMENT* XXV 



the years 1773, 1774, and 1775, from which we 

 fee, that the mercury fcarcely ever rofe higher 

 than 29 inches EngliHi, beyond the 60th degree of 

 South Latitude, and mounted almoft always to 30 

 inches, and even higher, in the vicinity of the tor- 

 rid Zone, which is a proof that the barometer falls 

 as you advance toward the South Pole, as well as 

 toward the North Pole, and that, confequently, 

 both are elongated. 



The Table of thefe barometrical obfervations 

 may be confulted ; it is given at the end of Captain 

 Cook's fécond Voyage. Thofe of the fame kind, 

 which have been coUedcd in the following Voyage, 

 exhibit no regular difi'erence from each other, 

 whatever be the Latitude of the veflel ; which is a 

 proof of their inaccuracy, occafioned, moft pro- 

 bably, by the irregularity which miift have arifen 

 from the fiicceffive death of the obfervers ; name* 

 ly, of the intelligent Anderfon^ furgeon of the (hip, 

 and Cook's particular friend; of that great man 

 himfelf J and of Captain Gierke his fucceffor ; and, 

 perhaps, likewife froma zealous partizan oîNewion, 

 who might have been difpofed to throw a cloud 

 over fads fo contrary to his fyllem of the flatten- 

 ing of the Poles. 



IV. The fourth proof of the elongation of the 

 Polesj is nautical. It confifts of itx experiments 



of 



