178 Intelligence and Miscellanies. 



II. The Barometer. 



1. Mean height of the barometer for the year, 30,03 



2. Means for the three separate observations, 



for sunrise, 30.04 



2 P. JVL 30.01 



10 P. M. 30.03 



These results differ so little as not to favor the hypothesis 



of a regular diurnal variation. 



3. Means for the several seasons, for winter, 30.06 



spring, 30.01 



summer, 30.09 



autumn, 30.01 



It appears, therefore, that the mean height of the barome- 

 ter during the several seasons, has been nearly equal. 



4. Maximum for the year, - - - 30.62 

 It occurred in March and April. In March the wind was 



N. W. and sky clear ; in April, wind N., sky likewise clear. 



Minimum for the year, ... 29.02 



Range, do. - - - - 1.60 



The entire range appears to be, therefore, extremely small. 



The minimum was observed on the night of April 24th, and 



was distinguished by a violent gale of wind accompanied by 



heavy rain. 



Other periods of unusual depression of the barometer 

 were as follows : — 



Jan. 1. Barometer 29.04 — a gale, with a violent snow storm, 

 Nov. 13. " 29.20— a gale which lasted all night, and 

 blew down the chimnies of the College Chapel. The only in- 

 stance of so low a state of the barometer which was not at- 

 tended with a gale, was on the 28th of December, when the 

 mercury stood at 29.23. The wind was high but not violent. 

 Maxima and Minima of the respective months. 

 January, Maximum 30.45 Minimum 29.04 Range 1.41 



February, 



it 



30.58 



tt 



29.40 



1.18 



March, 



it 



30.62 



tt 



29.44 



1.18 



April, 



M 



30.62 



tt 



29.02 



' 1.60 



May, 



tt 



30.05 



tt 



29.60 



' 0.45 



June, 



u 



30.39 



tt 



29.72 ' 



' 0.67 



July, 



it 



30.30 



tt 



29.89 



' 0.41 



August, 



tt 



30.40 



tt 



29.77 ' 



' 0.63 



September, 



tt 



30.50 



tt 



29.80 



' 0.70 



October, 



tt 



30.42 



tt 



29.41 < 



' 1.01 



November, 



tt 



30.58 



tt 



29.20 ' 



' 1.38 



December, 



tt 



30.56 



tt 



29.23 « 



' 1.33 



