388 Second Report of the Meteorological Committee, Sfc. 



The Northern Hemisphere he further observed, being by 

 reason of its greater quantity of land, more superficially heated 

 than the Southern, it should be expected that the mean pressure 

 beyond, the Southern tropic should exceed that beyond the 

 Northern, and be suggested this as a subject worthy of 

 examination by Meteorologists properly situated in both 

 hemisjjheres. 



Lastly, he observed, that severe gales occurring whether 

 in summer or winter, appear to depend on causes entirely 

 extraneous to the regular periodical lluctuations of pressure, 

 and are probably dependent on causes of a local and transient 

 nature — but that a correspondence of extraordinary reasons in 

 distant parts of the Globe, may be expected to accompany great 

 occasional deviations from the usual law of these fluctuations in 

 any given place, and that it is far from impossible that an 

 assiduous attention to this point may ultimately enable us to 

 predict their occurrence. 



The series of observations at the Port Office being still in 

 progress — the foregoing results are not considered as final, but 

 whatever modifications future years' observations may necessitate, 

 •VjII be fiomi time to time inquired into and reported. 



mum 



