1869.] between Air -currents and subsequent Weather. 



13 



Humidity of the Air. 



23ARNAOTJL. — Humidity of the Air. 



July. 



August. 



Sep 



October. 



> 

 0 



ft 



Dec. 



January. 



Feb. 



0 



u 



a 



April. 



May. 



June. 





August. 



Sept. 



October. 



> 

 0 



Dec. 



Hours of 

 mean time. 



63 



63 



59 



fir. 

 OO 



81 



8fi 

 00 



93 



94 



85 



c6 

 5° 



47 



5i 



56 



59 



fi/l 

 O4 



00 



82 



94 



O. 



60 



60 



r fi 



5° 



£■8 



5 s 



79 



8fi 

 00 



93 



94 



84 



55 



45 



50 



55 





63 



fir 

 °5 



79 



95 



I. 



59 



58 



55 



r 2 



5* 



78 



8 5 



93 



94 



83 



53 



45 



50 



54 



57 



02 



fi-> 

 02 



79 



95 



2. 



5* 57 



5° 



57 



76 



79 



94 



93 



83 



5 2 



45 



5i 



55 



rfi 

 5° 



fi-7 

 02 



fii 

 °3 



79 



95 



3- 



<;8 



C7 



5 2 



00 



75 



70 



93 



94 



83 



53 



45 



52 



56 



rfi 

 5° 



°3 



O4 



80 



96 



4- 



61 



5 Q 



55 



fi<» 



02 



75 



74 



93 



93 



83 



55 



46 



52 



57 



5° 



fir 



°5 



°7 



81 



95 



5- 



64 



65 



fir> 

 DO 



OO 



74 



73 



94 



93 



85 



57 



48 



53 



61 



fi-? 



°3 



fin 

 09 



fio 

 O9 



82 



94 



6. 



70 



7 1 



7 1 



Do 



73 



74 



94 



94 



85 



62 



52 



58 



65 



62 

 uo 



73 



fio 



09 



84 



95 



7- 



75 



75 



72 



70 



73 



74 



94 



94 



86 



6c 



57j H 



72 



73 



70 



72 



85 



94 



8. 



79 



79 



75 



7 1 



73 



75 



94 



94 



87 



68 



62 



68 



77 



77 



t2 



7° 



74 



86 



94 



9- 



82 



80 



7° 



7 1 



73 



7° 



94 



95 



88 



70 



65 



74 



80 



0 „ 

 so 



00 



7° 



86 



94 



10. 



82 



82 



.0 

 7° 



72 



74 



70 



94 



95 



88 



72 



68 



76 



84 



2-» 

 82 



2/i 

 82 



77 



86 



95 



11. 



84 



84 



77 



72 



74 



/ 5 



OA 



06 



89 



1 J 



72 



78 



85 



8a 



8? 

 °3 



79 



86 



95 



12. 



86 



85 



79 



73 



74 



74 



94 



96 



90 



75 



74 



80 



87 



86 



84 



80 



86 



96 



J3- 

 14. 



87 



86 



80 



74 



73 



73 



94 



96 



9 1 



77 



76 



81 



88 



87 



86 



80 



87 



96 



88 



88 



81 



74 



74 



76 



94 



96 



92 



I 9 



78 



83 



90 



89 



86 



81 



87 



96 



15- 



89 



88 



82 



76 



74 



78 



95 



96 



92 



80 



80 



84 



9i 



90 



87 



81 



88 



95 



16. 



89 



89 



82 



76 



72 



78 



95 



96 



92 



81 



78 



81 



89 



90 



88 



82 



88 



95 



17. 

 18- 



88 



90 



83 



75 



7A 



77 



95 



96 



92 



79 



74 



78 



86 



89 



88 



82 



09 



95 



86 



89 



82 



78 



75 



77 



95 



97 



92 



76 



7i 



72 



82 



86 



85 



81 



89 



96 



19. 



79 



84 



77 



78 



76 



77 



95 



97 



92 



74 



64 



69 



77 



82 



82 



So 



89 



96 



20. 



74 



79 



70 



72 



81 



79 



95 



97 



9 1 



66 



58 



62 



70 



76 



78 



76 



88 



96 



21. 



70 



73 



fi 7 ' 



68 



82 



82 



95 



96 



89 



6 l 



53 



58 



63 



69 



73 



73 



86 



95 



22. 



66 



67 



63 



64 



81 



84 



94 



96 



86 



58, 



5i 



55 



60 



62 





7i 



84 



95 



23. 



75 



M 



70 | 



69 



76 



78 



94 



95 | 88 



67 



61 



66 



72 



74 



76 j 



74 



85 



95 



Means 



1868, when the atmospherical conditions over these islands were very re- 

 markable ; easterly winds were prevalent over the central and northern 

 portions of the area, while in France there were strong westerly gales. 

 The channels of the currents were so close to each other that, while at 

 Yarmouth there was a strong easterly wind, there was a westerly gale at 

 Portsmouth. The contrast exhibited by the two currents as regards tem- 

 perature was very marked, and a dense fog was experienced in London. 

 Barometrical readings were very low over the region which separated the 

 districts of the respective currents. Next day pressure rose very rapidly ; 

 but this was only the precursor of an equally sudden diminution of its 

 amount, and of the advent of the equatorial current which swept with 

 great violence over these islands, producing a very serious southerly gale 

 on the 24th of January. 



On the 8th of December last, conditions similar to those of January 22 

 were observed. Strong easterly winds were reported from Scarborough, 

 while westerly winds of great force prevailed in the Channel and in France. 

 This state of things was succeeded, after an interval of two days, by a 

 southerly storm, the whole sequence of phenomena resembling very 

 closely what had been noticed eleven months before. 



