On Diurnal Variation of Barometric Pressure, dû 



a) How much the daily variation may be affected by the 

 local influence, may be seen by the comparison of the two curves 

 for Kew and Greenwich. 



b) Deviation curves for Aberdeen and Oxford have two 

 annual maxima and show very nearly opposite course. Falmouth 

 and Valencia resemble Aberdeen in some measure, while the mean 

 of Kew and Greenwich is rather of the Oxford type. This may 

 probably be accounted for, referring to the ideal case corresponding 

 to the equation (26) above. 



c) Comparing the deviation curve for Armagh and Glasgow, 

 we observe that they are reversed to each other between February 

 and July, while they are parallel in the interval July to September. 

 Moreover, taking the mean of Armagh and Glasgow, it is found to 

 be nearly parallel to Stonyhurst curve in the interval January to 

 September and also parallel to Liverpool curve between March and 

 September. 



d) Shifting the deviation curve for the mean of Kew and 

 Greenwich two months later, the curve becomes similar to Valencia 

 curve. 



e) The mean of Aberdeen and Oxford deviation curves is 

 inverted to the mean curve of the ten stations. 



It will be very interesting to study the actual origin of these 

 complicated anomalies under the light of an elementary theory as 

 propounded in the previous paragraphs. The results may in any 

 case be instructive for elucidating the actual mechanisms of the 

 daily exchange of the atmosphere over a region with various 

 geographical conditions. We hope we will be able to resume the 

 subject when the necessary data for the temperature variations are 

 at our disposal. 



In conclusion, we wish to express our best thanks to Prof. 

 T. Okada of the Central Meteorological Observatory for many 

 valuable informations. 



