OF PROGNOSTICKS. ( HAI-. 4- 



CHAPTER IV. 



OP THE INDICATIONS OF THE FUTURE CHANGES 

 OF THE WEATHER. 



ONE of the principal purposes to which 

 meteorology may be applied is, that of enabling 

 us to predict, in some measure, the ensuing 

 changes of the weather. In order to do this 

 accurately, a familiar acquaintance with the 

 modifications of the clouds, and indeed witli 

 all the operations which are going on above, 

 appears to be necessary. I hardly need lay 

 down the following rule for predicting atmo- 

 spheric changes. That when two or more 

 contrary inclinations appear, the result must be 

 deduced from those which ultimately prevail ; 

 and that when several agreeable signs are seen 

 together, the event may be considered as pre- 

 dicted with additional certainty.* Prognosticks 



* A rule laid down of old and sung by Aratus, who says 

 of Prognosticks, 



o, xaAov fttiri <nj|U,ar< ci^aa 



Arat. Dios. 412. 



