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



four hours sooner than at Plymouth, and at Portsmouth at 

 2 a.m. of the 13th, three hours later than at Plymouth. At 

 London and Bristol it began at the same hour as at Ports- 

 mouth, 2 a.m.*, so that its "progress in both directions is 

 clearly seen. 



In this case also, as in the previous one, the storm succeeded 

 a great depression of the barometer in the north. The order 

 of time in which the minimum height of the barometer was 

 attained, coincides exactly with that of the beginning of the 

 storm, and is very conspicuously marked in both directions ; 

 thus in that of the receding portion, or along the line c C of 

 fig. 3, the time of the minimum at Cork was early in the 

 morning, or during the night; at Falmouth 9 a.m.; at Ply- 

 mouth 10 a.m., and at Paris about noon; again in the direc- 

 tion of the advancing portion, or along the line C B, it was 

 two hours later at Bristol than at Falmouth, and at Shields 

 five hours later than at Bristol. I have not thought it necessary 

 to give a diagram showing the directions of the wind, because 

 they may be so easily described. The wind was south-west 

 in the south of Ireland and of England, east and north-east 

 in the north of Scotlandf, and south-east or south-south-east 

 (§11) between the two extremes, as in the north of England 

 and south of Scotland. 



This storm affords also an illustration of § 4; for though, as 

 on the 11th and 12th of November, 1842, the height of the 

 barometer at its cessation was not very far from equal through- 

 out, the reduction was greater in the north of England than 

 in the extreme south, yet in the former region it was a storm 

 of short continuance and no extraordinary violence, whilst in 

 the latter it is described as a perfect hurricane. 



Height of Barometer, January 1843. 



Names of Places. 



Orkneys .... 

 Glasgow 

 Belfast ..., 

 Armagh .... 

 Shields .... 

 Bristol .... 



Cork 



Falmouth , 

 Plymouth , 

 London ... 



Paris , 



Christiania 



11. 



28-76 

 2875 

 2910 

 28-85 

 28-80 

 2914 

 29-08 

 29-24 

 29-22 

 29-11 

 29-12 

 28-55 



12. 



28-99 



28-88 



2900 

 8909 



2903 



28-79 

 28-65 



28-57 

 28-81 

 28-78 



28-83 

 28-79 



28-79 

 28-67 



28-84 

 28-74 

 29-02 

 28-78 

 28-84 

 28-84 

 29-20 

 28-80 

 28-71 

 28-74 

 28-07 

 28-83 



2905 



28-90 



29-20 

 29-22 

 29-17 



28-97 



28-77 



28-82 

 28-70 



28-55 

 28-93 

 2913 



29-23 



29-22 



2911 



28-98 





* Shipping Gazette Newspaper, January 1843. 



t At Tobermorey (Mull) a hard gale from E.N.E. (§ 2), at North Shields 

 S.S.E., and in Leith Roads a gale Iroin ES.E. 



