ATMOSPHEROLOGY.r-BAllOMETEE. 375 



weather ; and its falling, rain, snow, or a change or 

 increase of wind. 



3. The mercury rising unusually high, and then 

 becoming stationary, indicates, in the months of 

 April and May, a continuance of fine weather ; 

 but in June or July, foggy weather. 



4. If, in the month of April, the mercury fall 

 with some rapidity, an inch or more, a storm will 

 most certainly succeed, however contrary appearan- 

 ces may be, v/hich will probably be the more severe 

 in proportion as it approximates the east, and will 



^ frequently continue with unabated violence for fifty 

 or sixty hours. 



5. The rising of the mercury usually precedes 

 the cessation of a storm ; but does not invariably 

 determine the period of its continuance, as storms 

 frequently blow for a day or two after the first rise 

 of the mercury. 



6. Sudden and repeated fluctuations in the ba- 

 rometer are indicative of unsettled weather; but 

 the rapid fall of the mercury is no indication of a 

 short gale, though in other regions the reverse 

 is said to be the case ; for before storms that con- 

 tinue two or three days, the barometer frequently 

 falls an inch within twenty-four hours, and, indeed, 

 in a gale as long and as heavy as I almost ever 

 witnessed, the fall of the mercury was above an inch 

 in twelve hours. 



