172 Transactions of the South African Philosophical Society. 



TABLE 11. 

 NuMBEK OF Cloudy Days in each Month. 





Cloud Ratio : 

 50 per cent. — 100 per cent. 



Cloud Ratio : 

 20 per cent.— 50 per cent. 





Number of 

 Days. 



Mean 

 per cent. 



Number 

 of Days. 



Mean 

 per cent. 



Jan 



52 

 47 

 47 

 39 

 22 

 16 

 18 

 19 

 30 

 43 

 31 

 48 



76 

 75 

 72 

 75 

 68 

 72 

 71 

 66 

 72 

 75 

 70 

 71 



41 

 36 

 43 

 48 

 35 

 34 

 31 

 36 

 40 

 42 

 46 

 40 



80 



Feb 



32 



Mar 



April 



May 



June 



July 



Aug 



Sept 



Oct 



28 

 26 

 32 

 32 

 30 

 29 

 26 

 31 



Nov 



Dec 



29 



28 







Year 



412 



72 



472 



29 



TABLE 12. 

 Mean Temperature of the Air on very Cloudy Days. 



Midnight. 



I 



II 



Ill 



IV 



V 



VI 



VII 



VIII 



IX 



X 



XI 



Noon 



XIII 



XIV 



XV 



XVI 



XVII. ... 



XVIII. ... 



XIX 



XX 



XXI 



XXII. ... 



XXIII. ... 



Year 



Jan. 

 o 



Feb. 

 o 



Mar. 



o 



April, 

 o 



May. 



o 



June, 

 o 



July. 



Aug. 







Sept. 

 o 



Oct. 

 o 



Nov. 

 o 



Dec. 







o 



68 



9 



68 



2 



64 



2 



59 







50 



9 



47 



1 



46 



6 



50 



5 



58 



2 



60 



1 



64 



7 



68 



8 



68 







67 



4 



63 



6 



58 



3 



50 







46 



1 



45 



5 



49 



6 



57 



4 



59 







63 



5 



67 



9 



67 



3 



66 



1 



62 



7 



57 



5 



49 







45 







44 



8 



48 



6 



56 



5 



57 



9 



62 



8 



66 



9 



66 



8 



65 



7 



62 



4 



56 



9 



48 



4 



44 



1 



44 







48 



2 



55 



7 



57 



1 



62 



1 



66 



2 



66 



3 



65 



2 



62 



2 



56 



4 



48 



3 



43 



7 



43 



6 



48 







55 







56 



8 



61 



6 



65 



5 



65 



6 



64 



5 



61 



6 



56 



2 



47 



8 



43 



3 



43 



1 



47 



3 



54 



4 



56 



2 



61 



3 



65 







65 



9 



64 



1 



61 



2 



56 







47 



4 



43 







43 



2 



47 



2 



53 



8 



56 



7 



62 



7 



66 



5 



68 



7 



66 



4 



62 



7 



56 



8 



47 







42 



5 



43 







47 



7 



55 



2 



60 



5 



65 



9 



69 



8 



72 



4 



70 



1 



66 



3 



60 



8 



50 







45 



8 



45 



9 



51 



7 



60 



2 



65 



1 



69 



7 



73 



5 



75 



8 



73 



7 



69 



3 



64 



1 



54 



1 



50 



9 



50 



2 



55 



6 



65 







68 



8 



72 



9 



76 



7 



79 



2 



77 







72 







66 



9 



56 



9 



55 



8 



53 



9 



59 



1 



69 



9 



71 



9 



76 







79 



6 



81 



6 



80 



1 



74 



5 



69 



6 



59 



8 



59 



3 



57 



1 



62 



9 



73 



4 



74 



3 



78 



5 



83 







83 



3 



81 



7 



76 



6 



71 



6 



61 



4 



61 



4 



58 



5 



64 



6 



76 



2 



75 



3 



80 



5 



84 



4 



84 







83 



1 



77 



3 



72 



6 



62 



4 



62 



6 



59 



3 



66 



9 



78 







76 



1 



81 



2 



85 



5 



82 



6 



83 



6 



77 



7 



72 



2 



63 



1 



63 



6 



59 



4 



67 



7 



77 



7 



76 



1 



80 



2 



84 



2 



80 



7 



82 



9 



76 



3 



71 



3 



63 



5 



63 



2 



59 



1 



67 



7 



77 



2 



74 



9 



79 







82 



4 



79 



1 



81 



8 



75 



2 



69 



9 



62 



3 



61 



5 



57 



2 



66 



9 



75 



8 



73 



2 



78 







80 



7 



77 



4 



78 



8 



73 



5 



67 



8 



59 



5 



57 



6 



54 



4 



64 



3 



73 



5 



71 



2 



75 



3 



79 



2 



76 







75 



7 



70 



8 



64 



9 



56 



4 



54 



4 



51 



5 



59 



9 



69 



2 



68 



3 



72 



9 



76 



6 



73 



4 



72 



8 



68 



7 



63 



2 



55 



1 



52 



8 



49 



8 



57 



3 



65 



1 



65 



6 



70 



1 



73 



5 



71 



7 



71 







67 



3 



62 



1 



54 







51 



9 



48 



3 



56 







63 



9 



64 



2 



67 



8 



71 



6 



70 



1 



69 



6 



66 



2 



60 



7 



52 



7 



50 



7 



47 



6 



54 



9 



61 



8 



62 



1 



66 



1 



70 







69 



3 



68 



6 



65 



4 



59 



7 



51 



6 



50 



1 



46 



7 



53 



4 



60 



2 



60 



5 



64 



8 



68 



8 



68-5 



68-0 



64-3 



58-7 



511 



49-6 



45-7 



52-4 



590 



59-4 



63-9 



67-7 



73 



5 



72-8 



68 



4 



63 



1 



54 



3 



51 



9 



49 



9 



56-2 



64 



7 



65-5 



70 



1 



73 



9 



Year. 



o 

 58 

 58 

 57 

 56 

 56 

 55 

 55 

 57 

 61 

 64 

 68 

 71 

 73 

 74 

 74 

 73 

 71 

 69 

 66 

 64 

 62 

 61 

 59 

 59 



63-7 



