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THE EUROPEAN STORM OF DECEMBER 21-28, 1836. 



observed at noon of each day differed from the mean temperature of the station at 

 that hour. At some of the stations no observations were made at noon, and in such 

 cases the thermometric fluctuation Avas interpolated by a comparison of the pre- 

 ceding and subsequent observations : — 



In accordance with the preceding numbers, the lines of equal thermometric dis- 

 turbance have been drawn upon the eight accompanying charts. On each chart is 

 drawn the line of mean temperature. On seven of them is drawn the line of ten 

 degrees below the mean ; and on four of them is drawn the line of ten degrees above 

 the mean. During most of the eight days, throughout the principal part of Europe, 

 the thermometer was below its mean height ; but on the 21st, throughout the whole 

 of Europe, except the extreme northern and southern portions, the thermometer 

 stood above its mean height. Throughout Central Europe the thermometer nowhere 



