,[ 49 ] 



The moft important changes that take place in the atmofphere 

 feem to me to be thofe that happen five or fix days before, or 

 during, or five or fix days after the vernal equinox, that is 

 from the i6th to the 28th of March. In Dublin the natural 

 height of the barometer is 30 inches, but in the above-men- 

 tioned period its mean height was 29,838, that is 0.162 parts 

 of an inch too low ; and the mean height of the whole month 

 was 29 707, that is 0.293 parts of an inch too low, or below 

 the ftandard height. Yet the wind was chiefly S. or S. W. 

 which fcems to denote an accumulation in that quarter ; for 

 otherwife why fhould it blow from a warmer to a colder 

 region ? 



January. 



The coldeft days in January were the nth, 12th, 13th and 

 14th ; wind N. and N. E. except the 14th, when it was S. S. E. ; 

 yet the barometer was rather low, being between 29.28 and. 

 29.42 ; on the 15th it was 28.76. This deferves attention. 



February. 



The coldeft days in February were the 17th, i8th and 

 1 9th ; wind E. and N. ; barometer in the mean time froiu 



30.65 to 30.06. 



At Montmorenci, Pere La Cotte obferved a much greater 



cold between the i6th and 24th ; on the 8 th a ftorm at W. 



Vol. V. G With 



