178 Transactions oj the South African Philosophical Society. 



TABLE 19. 



Pressure Deviations from the Normal (reduced to the 

 Normal Mean) on Clear Days. 





Jan. 



Feb. 



Mar. 



\pril. 



May. t 



Tune. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



Year. 





in. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



Midnight. 



•014 



•003 



•012 



•Oil 



•009 



•006 



•002 



•004 



•001 



•015 



•008 



•013 



•008 



I 



13 



7 



2 



2 



12 

 10 



8 

 5 



7 

 7 



5 



4 



2 

 



4 

 3 



1 

 1 



11 

 9 



7 

 7 



11 

 9 



•006 



II 



•005 



Ill 



4 







6 



3 



5 



4 



1 



1 



1 



7 



7 



7 



•004 



IV 



3 



2 



4 



1 



4 



4 



3 



1 



2 



5 



6 



6 



•002 



V 



1 



4 



2 



1 



4 



4 



2 



1 



1 



4 



6 



5 



•002 



VI 



1 



5 



2 



1 



4 



3 



2 



1 







2 



4 



3 



•001 



VII 







6 



3 







4 



3 



3 



1 



1 







4 



2 



•001 



VIII. ... 



2 



6 



1 







2 



2 



2 



2 



1 



4 



3 



1 



•000 



IX 



3 



6 



1 



1 



2 



2 



3 



1 



1 



4 



1 



1 



•001 



X 



4 

 5 



5 



4 





 2 



1 

 1 



1 

 1 



2 

 1 



1 

 1 



2 

 2 



3 







6 

 6 



1 



4 



3 

 5 



•002 



XI 



•002 



Noon ... 



8 



4 



4 



3 



2 







3 



3 



1 



7 



6 



10 



•004 



XIII. ... 



9 



5 



6 



5 



2 



3 



3 



3 



1 



7 



8 



10 



•005 



XIV 



8 



5 



8 



6 



4 



2 



1 



4 



1 



6 



7 



12 



•005 



XV 



7 



5 



8 



6 



5 



2 







4 



1 



7 



8 



8 



•005 



XVI. ... 



7 



3 



9 



8 



6 



3 



1 



4 



1 



4 



5 



7 



•005 



XVII. ... 



2 



1 



8 



6 



5 



1 







3 







5 



2 



5 



•003 



XVIII.... 







4 



5 



5 



4 



1 



2 



3 



2 



3 



2 



1 



•001 



XIX 



2 



8 



2 



2 



4 



1 



3 







2 



3 



1 







•001 



XX 



2 



11 



1 



1 



4 



1 



4 







3 



1 



2 



2 



•001 



XXI 



3 



11 



2 



2 



4 



2 



3 







4 



1 



1 







•001 



XXII. ... 



3 



9 



4 



3 



3 



2 



4 



1 



6 



2 



3 



1 



•002 



XXIII.... 



1 



10 



4 



4 



3 



1 



4 







2 



2 



5 



1 



•002 



TABLE 20. 

 Pressure on Cloudy Days. 





Year. 



Difference : 

 Cloudy 

 mimis 

 Clear. 





Year. 



Difference : 

 Cloudy 

 minus 

 Clear. 



Midnight.. 



I 



II 



inches 

 26^139 

 •135 

 •129 

 •125 

 •126 

 •134 

 •145 

 •157 

 •167 

 •169 

 •165 

 •155 

 •134 



inches 

 •018 

 •020 

 •023 

 •026 

 •028 

 •028 

 •030 

 •030 

 •031 

 •033 

 •035 

 •035 

 •038 



XIII. ... 



XIV. ... 



XV. ... 



XVI. ... 



XVII. ... 

 XVIII. 

 XIX. ... 

 XX 



XXI. ... 



XXII. ... 

 XXIII... 



Mean ... 



inches 

 •112 

 •092 

 •082 

 •076 

 •080 

 •091 

 •105 

 •119 

 •128 

 •137 

 •137 



inches 

 •040 

 •040 

 •040 



Ill 



IV 



V 



•040 

 •036 

 •033 



VI 



VII 



VIII 



IX 



X 



•030 

 •030 

 •030 

 •026 

 •028 



XI 



Noon 





•26^127 



•031 



