FOR THE TEAR I8G7, 



RELATIVE HUMIDITY. 



186T. 



Average 



of 

 20 years. 



Extremes. 



Mean humiclity of the year 



Month of greatest humidity 



Greatest mean monthly humidity 



Month of least humidity 



Least mean monthly humidity ... 



74 ^ 



January. 



82 



July.- 



66 



January. 



83 



82 in 1851. 

 Jan. 1857. 



Feb. 18i-3. 

 58 ■ 



7-3 in 1S58. 

 Dec. 1858. 



81 

 April. 1849. 



76 



EXTENT OF SKY CLOUDE]>. 



14 years. 



Extremes. 



Slean clondlness of the year 



Most cloudy month 



Greatest monthly mean of cloudiness 



Lea.st cloudy nionth 



Lowest monthly mean of cloudiness .. 



0.61 

 February. 



0.82 

 September 



0.29 



0.61 



Noveniber. 



0.74 



August. 



0.47 



0.65 

 o'.83 

 o'.29 



0.57 



o'.'iz 

 o'.'so 



1S67 



Result 



of 



19 years. 



Extremes. 



Resultant direction 



Resultant velocity in miles 



Mean velocity, without regard to direction 



Month of greatest mean velocity 



Greatest monthly mean velocity 



Month of least mean velocity 



Least monthly mean velocity 



Day of greatest mean velocity 



Greatest daily mean velocity 



Day of least mean velocity 



Least daily mean velocity 



Hour of gieatest absolute velocity < 



Greatest velocity 



N. 60° W. 



2.05 



7.00 



December. 



10.32 



June. 



4.13 



May 1. 



20.99 



Aug. 7. 



0.23 



Dec. 6. 



7 to 8 p.m. 



36.8 



N. 61° W. 

 1.89 

 6.89 

 March. 

 8.83 

 July. 

 4.95 



23.05 



40.02 



8.55 in 1860. 

 Mar. 1860. 



12.41 

 August, 1852 



3.30 

 Mar. 19. '59. 



31.16 



Dec. 27, '61. 



9-10 a.m. 



46.0 



5.10 in 185S. 

 Jan. 1848. 



5.82 

 Sept. I860, 



5.79 



Dec. 2, 184S. 



15.30 



Mar. 14, '53, 



11 to nooii. 



25.6 



