18 



METEOROLOGICAL REPORT, 18(57, 



Culumn II.— Gives mean height in grains of vapour in a cubic) 3 p , j 

 foot of air at ) 



,, III.- — The mean addition of vapour required for complete^ q * , r 

 saturation of a cubic foot of air, at ) 



IV.— Ditto 



ditto 



ditto 



ditto 



ditto 



.3 P.M. 



January ... 

 February... 



March 



April 



May 



June 



July 



August . . . 

 September 

 October ... 

 November 

 December 



9 a.m. 



3 P.M. 



Deficiency. 



9 A.M. 



3 p.m. 



2-70 



2-84 



0-17 



0-30 



2-58 



2-72 



0-25 



0-62 



2-77 



2-85 



0-40 



1-05 



3-26 



3-37 



0-68 



1-41 



4-02 



4-06 



1-10 



2-04 



4-71 



4-78 



1-45 



2-42 



5-07 



5-26 



1-50 



2-27 



5-00 



5-07 



1-18 



2-27 



4-66 



4-77 



0-73 



1-93 



3-96 



4-01 



0-35 



1-08 



3-27 



3-42 



0-22 



0-55 



2-78 



2-89 



0-17 



0-37 



The amount of water which the air contains increases with its 

 temperature. The mean relative humidity of the air is greater at 

 9 A.M. than at 3 p.m. The mean quantity of vapour in this time 

 actually increases ; but as the increase is not in proportion to 

 the increase of temperature in the same intei'val, the air is drier. 



AVERAGE RAINFALL OF THE VARIOUS STATIONS IN THE ACCOMPANYING 



TABLE. 



1866. 1867. 



In the Coast District 27*34 23*71 



,, Tees District 31-01 27*69 



„ Wear District 31*77 27*19 



,, Coquetdale and Wansbeck District 32*78 29*11 



,, Tyne District 33*50 29*10 



