Mr. W. Brown on the Oscillations of the Barometer. 273 



Orkneys), which on this day was rapidly removed by the air 

 flowing towards it, for at Christiania the height of the baro- 

 meter in the morning was 29*61 and in the evening 29*96. 

 The strength of the south wind after this increases, and on 

 the 2nd and 3rd prevailed almost throughout, occasioning a 

 slight general fall of the barometer until 9 a.m. on the 3rd ; we 

 still however have evidence of the north-east wind blowing on 

 the east, as on the 2nd, on the south-east coast of England, 

 and on the 3rd in the same part, as at the North Foreland, 

 where it was variable (the one and the other of the currents 

 alternately prevailing), and at Deal, where it was north-east, 

 these being almost the most easterly parts of England. After 

 this, however, the north-east wind advanced, becoming ge- 

 neral on the eastern side on the 4th, and raising the baro- 

 meter as before described, the south wind only appearing on 

 the west, blowing there, according to § 11, from south-east. 

 On the 5th and 6th the north-east prevailed throughout, and 

 the barometer was slightly depressed in all the northern sta- 

 tions, beginning at the Orkneys ; the cause of which might 

 be, either the subsidence of an elevation above adjacent loca- 

 lities on the south, by the flowing of the air towards them, or 

 it might be the beginning of the descent of the upper current 

 on the north, which manifested itself at the Orkneys on the 

 6th by changing the wind to north-west. 



Names of Places. 



Orkneys ... 

 Glasgow... 

 Belfast ... 

 Armagh ... 

 Shields ... 



Cork 



Bristol ... 

 Plymouth 

 London ... 



Paris 



Christiania 



-13 

 -•13 



-04 

 -•03 

 +•02 



•00 

 -03 

 -03 

 -•18 



-•05 



-•03 

 +•01 



•00 



-•30 

 -•16 



-12 



-•07 



•00 

 •00 



+•10 

 -•14 



-•17 

 -•20 

 -•24 

 -•20 

 -•18 

 -•20 

 -•04 

 -03 

 +•02 

 -01 

 -•20 



-•15 



-•08 

 -12 



—07 



•41 .--72 

 •29 --54 



•16-27 



-•27 

 •05 --06 

 17 --12 



-11 



-•06 



+•20 

 +'17 



+•19 

 •00 



-11 

 -12 



-•04 

 -•18 



Names of Places. 



Orkneys .... 

 Glasgow.... 

 Belfast .... 

 Armagh .... 

 Shields 



Cork , 



Bristol .... 

 Plymouth , 

 London ... 



Paris , 



Christiania 



10. 



+•39 

 +•24 

 +•24 

 +•04 

 +•25 

 -•08 

 +•02 

 -•05 

 -•02 

 -•05 

 -14 



-•08 



-•03 

 -14 



+•21 

 -•12 



-•37 

 -•19 



-•22 

 -•27 



-•04 

 -•20 

 +•20 



11. 



-•13 



-•38 

 -•47 

 -•23 

 -•29 

 -•27 

 -•30 

 -•23 

 -•46 

 -•20 

 +•11 



-•08 



-•15 

 -•02 



-•25 

 -•18 



-•06 

 -•25 



-•03 

 +•02 

 -•18 

 -16 

 •00 



Phil. Mag. S. 3. Vol. 28. No. 187. April 184-6. 



U 



