13 



THE EUROrEAN STORM OF DECEMBER 21-28, 183G. 



witli tolerable accuracy; but at some of the stations the mean height of the 

 barometer is only approximately determined. Columns five to twelve furnish the 

 difference between the mean height of the barometer and the height observed 

 at noon for each day from December 21st to December 28th. At some of the 

 stations no observation was made precisely at noon, and in such cases the baro- 

 metric fluctuation Avas computed by a comparison of the preceding and subsequent 

 observations : — 



In accordance Avith the preceding numbers, the lines of equal barometric disturb- 

 ance have been drawn upon the eiglit accompanying charts from December 21st to 

 December 28th. On each chart is drawn the line of mean pressure ; also the line 

 of a quarter inch elevation above the mean, and one-half inch above the mean ; and 

 also the lino of a quarter inch depression beloiv the mean. On six of the charts is 



