EASTING OF THE TRADE- WINDS, ETC. 169 



of 36'' S. and 50° N., Lieut. Anclimi, of the Dutch '^axj, has 

 collected from the abstract logs at the Meteorological Institute of 

 Utrecht no less than 83,334 observations on the height of the 

 barometer ui the following bands : 



Nnmher of Ohservations and Mean He/gU of the Barometer heticeen the Parallels of 

 78° 37' .V. and 74° S.* 



the northern than iu 

 the southern hemi 

 sphere. 



(1) From 50O X. to 36d S. the observations are the mean of 83,334 taken from " Jlaandelijksche 

 Zeilaanwijzingen van Java naar het Kanaal Koninklijk Xederlandsch Meteorologisch Iiistituut, 1850." 

 ^2) Greenwich; mean of 4 years' observatioQs. 

 (3) St. Petersburg ; mean of 10 years' observations. 

 (*) Dr. Kane ; 12,000 observations (mean of 17 months' observations). 

 (5) Hobart Town ; mean of 10 years' observations. (") Sir J. C. Ross ; " Erebus and Terror." 



363. The diagram of the winds (Plate I.) has been constructed 

 More atmosphere in SO as to show by its sliadcd bordcT tliis uncqual 



distribution of the atmosphere between the two 

 hemispheres. Have we not here proof that the 

 southern hemisphere (§ 261) is indeed the boiler to this mighty 

 atmospherical engine ? The aqueous vapom^ rising from its waste 

 of waters drives the air away from the austral regions, just as the 

 vapour that is formed in the real steam-boiler expels the air from 

 it. This difference of atmosphere over the two halves of the globe, 

 as indicated by the barometer, is very suggestive. 



364. Admiral Fitzroy has also reduced from the abstract logs in 

 A standard of com- fj^e Metcorological Department of the Board of Trade 

 meter at sea. in Loudou a OTcat muuber of barometrical observa- 



o 



* Below the parallels of 50° N. and 36° S. the observations are reduced to the 

 Temp, of 32° Fahr. 



