[ 47 ] 



ponding variations. On the other hand, variations in a contrary 

 fenfe, but inconfiderable in their extent, are often obfcrved in 

 places very near to each other, as Franeker and Lewarden, as 

 Mr. Van Swinden affures us *. 



SECOND OBSERVATION. 



The deviations of the ? from its mean annual altitude are far 

 more frequent and extenfive in the neighbourhood of the poles 

 than in that of the equator. At Peterfburgh, An. 1725, the ? 

 once flood at the ftupendous height of 31,59 inches, if we may 

 credit Mr. Confett 5 and yet it has been feen fo low as 28,14 inches. 

 In the northern parts of France the variations are greater than 

 in the fouthern f ; at Naples they fcarcely exceed one inch J. In 

 Peru, under the equator, and at the level of the fea, they 

 amount only to two or three-tenths of an inch ; but in other 

 parts, within a few degrees of the line, on the approach of the 

 rainy feafon or of hurricanes, the barometer falls an inch or 

 more §. 



THIRD OBSERVATION. 



The variations without the tropics are greater and more fre- 

 quent in the winter than in the fummer months. VIII. PhiL 

 Tranf. Abr. 605. La Cotte, 298. 



* Obfervations fur le froid de L'annee 1776, p. 55. VIII. Phil. Tranf. Abr. p. 555^ 



f La Cotte, p. 186. 



t VIII. Phil. Tranf. Abr. p. 566. 



§ Boug. Fig. XXXIX. Phil. Tranf. 1778, p. 182. Hift. of Jamaica, Vol. I. p. 372. 



FOURTH 



