Prof. Dove's Outlines of a general Theory of the Winds. 357 



from observations made at Paris for 10 years for the eight chief 

 winds. 



Variations in Millimetres. 



( — ) signifies rising, (+) falling. 



The import of the signs is here the opposite to that of those in the 

 other table, in order that they should coincide with the monthly determi- 

 nations for Danzig. 



The calculation mentioned under the former table for Dan- 

 zig, will be found in Pog. Annal., vol. xxxi. p. 468. It is, 

 however, known that the mean direction of the wind under- 

 goes a periodical change within the year, which will appear 

 from the following table, in which the angles, calculated 

 according to Lambert's formula, are enumerated from 

 south, as zero, towards west. 



From the combination of the results of these two tablestt 

 follows, that the law of the rotation of the wind which is evinced 

 in the barometrical variations, is independent of the variations 

 of its mean direction. 



