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A number of oscillations in excess of the average at 

 Geneva, in the months of January, March, June, July, 

 August, and November, is accompanied by a larger amount 

 of oscillation than when the number is below the average; 

 during the rest of the year the converse holds good. For the 

 entire year, an increased number of oscillations is accompanied 

 by an increased amount of oscillation. 



At the St. Bernard, a number of oscillations above the 

 average, in the months of January, February, March, April, 

 May, August, September, and November, is accompanied by 

 a larger amount of oscillation than when the number of oscil- 

 lations is below the average. In the remaining months of 

 the year the converse of the above holds good. The mean 

 of the year gives the same results as Geneva. 



A rain fall above the average, at Geneva, is accompanied 

 by a larger amount of oscillation, in every month of the year, 

 than when the rain fall is below the average. 



At the St. Bernard, a rain fall above the average, in the 

 months of February, March, May, July, August, November, 

 and December, is accompanied by a larger amount of oscilla- 

 tion than a rain fall below the average ; during the remainder 

 of the year the converse of this exists. 



On the mean of the year, a rain fall above the average is 

 accompanied by a less amount of oscillation than a rain fall 

 below the average. This result is curious, being the direct 

 converse of what was obtained for Geneva. 



The conclusions which may be drawn from this investiga- 

 tion are the following. As we ascend in the atmosphere, the 

 amplitude of the irregular diurnal oscillations of the barometer 

 diminishes, more especially in the winter months; the summer 



