THE 

 LONDON, EDINBURGH and DUBLIN 



PHILOSOPHICAL MAGAZINE 



AND 



JOURNAL OF SCIENCE. 



♦ 



[THIRD SERIES.] 



APRIL 1846. 



XLV. On the Oscillations of the Barometer^ with particular 

 reference to the Meteorological Phenomena of November 

 1842*. By William Brown, Jun.\ 

 [With Six Plates.] 



IN order to illustrate and confirm the views I have before 

 advanced in this Magazine (vols. xx. and xxiii.), on the 

 connexion between the direction of the currents of the atmo- 

 sphere and the oscillations of the barometer, I have endea- 

 voured to make a direct application of them to the explana- 

 tion of the various phaenomena presented by the winds in 

 this country during a great portion of the month of Novem- 

 ber 1842, that month including an extremely unsettled and 

 stormy period of weather. For this purpose, I have col- 

 lected observations showing the state of the wind and the ba- 

 rometer in various parts of this kingdom, and also at Chris- 

 tiania in Norway, and at Paris; and exhibited the direction of 

 the wind on diagrams, with the variations of the barometer in 

 hundredths of an inch annexed. The data from which the 

 diagrams are constructed, and which are given p. 262, with 

 the exception of those for North Shields, the place of my own 

 register, are extracted from the Shipping and Mercantile Ga- 

 zette Newspaper; a newspaper containing daily reports from 

 most of the parts of Great Britain and Ireland, of the state of 

 the wind and weather, on which nautical men are accustomed 

 to rely for that kind of information ; and the accordance of the 

 observations at places situated near each other is sufficiently 

 marked to confirm their general correctness, and thus give 

 confidence in those of more isolated localities. 



The barometrical observations have been collected with 



* This essay, with the exception of some additions, although only now 

 published, was written soon after this period. 



■f Communicated by the Author. 

 Phil. Mag. S. 3. Vol. 28. No. 187. April 1846. S 



