[ 39° 1 



3tio. The variations at lakutz, proceeding from a difFerent 

 effluence, namely, the fupra-marine, have no connexion with the 

 preceding ; this the table fufficiently indicates in every inftance, 

 but in none fo remarkably as on the 3jft of May, for while the 

 mercury in all the other above-mentioned places is on the fall, 

 (which proves the identity of the influence to which they are fub- 

 jeded) it rifes at lakutz. 



This fynoptical view of barometrical obfervations at difFerent 

 diftant places is the only one, I believe, as yet exhibited ; yet if it 

 had been extended to latitudes ftill more fouthern, as it eafily 

 might, much light could not fail of being thrown on this obfcure- 

 fubjed. 



Section* III. 

 0/ the Origin of (he General Trade Winds. 



Though the origin of the general trade winds appears to me to 

 have been fully eftablifhed by Dr. Halley, yet it feems he has ex- 

 plained himfelf too briefly, fmce his explanation has been mif- 

 underftood by many, and was thought obfcurc even by D'Alem- 

 bert*. 



* Sur la Caufe des Vents. V. 



To 



