New York Weather Bureau. 



499 



TABLE No. 30. 

 Relative Httmidity {Per Cent). 



STATION. 



Block Island, R. I 

 New York city... 



Albany 



Oswego 



Rochester 



Buffalo 



Erie, Pa 



« 



79 



70 

 70 

 71 



72 

 74 

 73 



lAltliougli tTie absolute amount of moisture in the air is least 

 during the winter, the 'percentag'e relatively to saturation (the 

 relative humidity) is then generally a;t a maximum. At Block 

 Island, however, the northerly winter winds 'hiavet traveiised a 

 lesser expanse of water surface than the somtherly or ocean, 

 winds of summer, and this circumstance, with the more moderate 

 degrees of hea/t and cold to which the island is subject, reverses 

 the rule applying to inland stations, causing the maximum 

 humidity to occur during the summer. This is the case also 

 along the south shore of New England and prohaibly over the 

 greater part of Long Island. 



The maximum humidity at it!he Weather Bureau Stations within 

 the State is found at Buffalo, which is subject to prevailing 

 winds from the Lake. The region of leas)t moisture, on the other 

 hand, appears to be the Ohamplain valley, as shown by a two 

 years' record ait Plattsburgh. The conditions are here very dis- 

 similar to thiose of stations at the same latitude in the St. 

 Lawrence vallev, the latter region showing substantiallv the 

 same humidiity which oibtains near the Grreat Lakes. 



Definite values of the relative humidity at stations of the 

 State Service are omitted here, owing both to the brevity of (their 

 records and to the fact that the hours land methods of observation 

 generally employed iby voiunittary oibservers give results which 

 can only be compared with those of the National Service by tak- 



