[BockV, 



CHAP. XlH. 



OF THE PROGNOSTICS OF THE 

 WEATHER. 



Imperfetl Stat-' cfthis "Branch of Science. Prognofiics of Weather front 

 the previous Slate of the Sea/an. From the Undulations of the At- 

 mofpbere. From the Barometer. From Fogs. From Chuds.* 

 From ProfpeBs. From the DFW. From the Sfy* From the Mc.cn. 

 "From the Wind. 



A METHODICAL arrangement of meteorolo- 

 gical phenomena, by which more certain prog- 

 nofticsofthe weather might be procured, is a great 

 defideratum in the fcale of ufeful knowledge. That 

 philofophers have already a confiderable acquaintance 

 with the nature of heat, water, and air, their numerous 

 and ingenious experiments {efficiently prove; but 

 when thefe three ingredients of nature are in a com- 

 pound ftate floating round our globe, and producing 

 all thcfe various agitations and combinations, known 

 under the general denomination of weather, then their 

 knowledge feems to be without fyftem, without cer- 

 tainty, and, contrary to the very end of true philofophy, 

 almoft without utility. From the combination of air 

 and water with heat, from their circulation and their 

 decompofitlon, ariles all that variety of weather of 

 which the atmofphere of all countries, and particularly 

 that of .iflands, is fo fufceptible. 



The 



