research in british west africa. 



Table D. 

 Monthly Temperatures for 1909. 



313 





Jan. 



Feb. 



Mar. 



Apr. ' 



1 



May. 



June. 



July. 



Aug. 



Sept. 



1 



Oct. ! 



Nov. 



Dec. 



Miiiduguri -; 



Max. 



ion 



107 



112 



109 



112 



102 



99 



94 



101 



102 



102 



98 



Min. 



49 



53 



58 



66 



71 



69 



68 



67 



68 



65 



60 



54 



Mean 



73 



81 



89 



89 



92 



86 



81 



80 

 93 



82 

 103 



83 



81 



75 

 101 





Max. 



101 



106 



110 



110 



109 



102 



100 



107 



105 



Geidam...-! 



Min. 



46 



51 



55 



64 



72 



70 



68 



67 



68 



63 



60 



53 





Mean 



70 



79 



87 



89 



91 



85 



82 



79 



83 



85 



82 



75 





Max. 



99 



101 



105 



109 



106 



100 



92 



92 



98 



100 



98 



94 



Sokoto ...< 



Min. 



U 



60 



75 



70 



70 



69 



70 



68 



68 



68 



64 



55 





Mean 



75 



82 



90 



89 



88 



83 



80 



76 



76 



84 



80 



75 



Kano ..A 



Max. 



90 



96 



107 



109 



106 



99 



95 



96 



96 



99 



99 



98 



Min. 



47 



56 



60 



65 



67 



64 



67 



63 



67 



61 



52 



53 



Mean 



68 



76 



85 



87 



87 



81 



79 



76 



80 



81 



76 



72 



r 



Max. 



99 



104 



107 



103 



101 



92 



90 



90 



90 



96 



98 



96 



Yola .., \ 



Min. 



58 



65 



72 



69 



69 



66 



66 



67 



67 



68 



63 



61 





Mean 



79 



86 



89 



85 



83 



79 



76 



77 



78 



81 



82 



78 



Birnin J 

 Kebbi "1 



Max. 



97 



102 



105 



104 



102 



95 



96 



87 



92 



96 



97 



92 



Min. 



48 



56 



70 



70 



60 



70 



72 



70 



70 



70 



62 



53 



Mean 



73 



80 



89 



88 



84 



82 



81 



77 



80 



81 



79 



74 





Max. 



96 



100 



105 



104 



100 



94 



92 



89 



94 



96 



95 



92 



Bauchi ... -; 



Min. 



49 



67 



68 



64 



60 



35 



57 



59 



61 



66 



64 



62 





Mean 



74 



89 



86 



83 



80 



76 



74 



76 



77 



79 



79 



78 





Max. 



100 



103 



105 



101 



102 



98 



96 



92 



94 



102 



101 



98 



Baro ... < 



Min. 



59 



71 



71 



71 



71 



67 



71 



68 



70 



71 



71 



65 





Mean 



84 



88 



88 



85 



85 



83 



81 



80 



81 



84 



86 



83 





Max. 



100 



101 



103 



101 



99 



95 



91 



92 



93 



96 



100 



99 



Zungeru -< 



Min. 



61 



66 



71 



70 



69 



69 



67 



68 



68 



67 



56 



60 





Mean 



81 



85 



87 



84 



83 



81 



78 



77 



79 



81 



80 



79 





Max. 



99 



100 



100 



97 



97 



94 



89 



92 



95 



95 



96 



95 



Lokoja ... < 



Min. 



58 



68 



72 



70 



70 



66 



69 



70 



68 



70 



70 



61 





Mean 



82 



85 



86 



84 



83 



80 



79 



79 



80 



83 



85 



81 





Max. 



97 



99 



98 



100 



98 



94 



92 



92 



90 



95 



99 



102 



Ilorin ...-( 



Min. 



53 



71 



68 



67 



68 



66 



67 



68 



67 



65 



66 



52 





Mean 



80 



84 



84 



82 



82 



80 

 88 



77 



78 

 84 



78 



80 



82 

 93 



78 





Max. 



93 



95 



96 



92 



90 



84 



87 



90 



91 



Ankpa ...< 



Min. 



57 



62 



67 



67 



63 



63 



65 



65 



64 



65 



64 



56 





Mean 



77 



81 



81 



78 



76 



75 



75 



75 



74 



76 



79 



70 



The above Table gives the monthly maximum, minimum, and mean shade 

 temperatures for twelve stations for the year 1909, and must be taken in con- 

 junction AA'ith the rainfall and humidity. I do not propose to analyse the data in 

 detail, but would point out that the stations have been ari-anged in the order of 

 descending maxima. It will be seen tliat this is also appi'oximately the order of 

 22036 2 



