100 



MEAN METEOROLOGICAL RESULTS 



BAROMETER. 



Mean pressure of the year 



Month of highest pressure . . , 

 when the mean pressure of 



the month was 



Month of lowest pressure . . . , 

 when the mean pressure of 

 the month was 



1861. 



29.6008 



December 

 29.7461 



November 

 29. 5371 



Average of 

 18 years. 



29.6133 



September 



29.6629 



June 



29.5624 



Extremes in 18 years. 



29.6679 29.5880 

 (in 1849.; { (in 1852.) 

 June, 1849 | Sept. 1860 



29.8030 I 29.6733 



March,1859: Nov. 1849 



29.4215 29.5868 



Maximum pressure of the year. . 



which occurred 



Minimum pressure of the year . . 



which occurred 



Range of the year 



1861. 



30.330 

 Jan. 22 



7p.m 

 28.644 



May 6 

 lOp.m 



1.686 



'} 



Average of 

 9 years. 



30.372 

 28.592 

 1.780 



Extremes in 9 years. 



30.552 



Jan. 1855 



28.286 



March, 1859 



2,106 

 (in 1859.) 



30.245 



Dec. 1854 



28.849 



March, 1858 



1.429 

 (in 1860.) 



There were one hundred and three days when the mean pressure of 

 the day differed 0.200 of an inch and upwards, from the adopted 

 normal mean of the day. Their distribution through the year may 

 be seen from the following table : 



HUMIDITY. 



Mean humidity of the year . . . . 



Month of greatest humidity 



when the mean humidity of ) 



the month was j 



Month of least humidity 



when the mean of the month ) 

 was ( 



1861. 



78 

 January 



88 



May 



69 



Average of 

 20 years. 



Extremes in 20 years. 



82, in 1851 

 Jan. 1857 



89 



Feb. 1843 



58 



73, in 1858 

 Dec. 1858 



81 



April 1849 



76 



