456 METEOROLOGY. 



at the north, the weather is completely reestablished. The stratum of 

 imllio-cumidus opens up, is broken, and continues thus to chase from the 

 southwest; then it revolves, in turn, toward the north, in order, 

 later, to commence a new rotation. The second stratum of superior 

 pallio-cirrus proceeds in like manner, and disappears also. 



Such are the principal facts concerning the azimuthal rotation of the 

 winds and clouds, and, in general, of the diverse questions which have 

 been treated in the course of these summary instructions, on which it 

 is of the liighest importance to fix the attention of observers in all 

 I^arts of the world. Indications analogous to those which the observa- 

 tions made at the observatory of Havana have furnished us, should 

 they be contradictory under identical latitudes, either by reason of the 

 difference in longitude, or by the difference in the topography of the 

 countries explored, will not be the less imi)ortant on this account, and 

 they will conduct us to a true conception of atmosphenc circulation alto- 

 gether, by putting us on the track of rational and scientific previsions. 



