OSCILLATIONS AT GENEVA AND GREAT ST. BERNARD. 13 



January 



February 



March 



April 



May 



June 



July 



August 



September 



October 



November 



December 



Mean for the year 



Geneva. 



inch. 

 o'i66 



o'i5o 

 o'loS 

 0*09 1 

 0*074 

 ©•072 

 0-074 

 0*092 

 0*109 

 0*114 

 0*136 



0*1115 



Great St. 

 Bernard. 



inch. 



O'lII 

 O'lII 



0*115 

 0*094 

 0*070 

 0*074 

 0*072 

 0-065 

 0-083 

 0*092 

 0*084 

 0*110 



0*0901 



The figures for Geneva give a maximum in January^ 

 and a minimum in July^ instead of August ; but it is pro- 

 bable he has used very few years, as his maxima and 

 minima appear to be greatly in excess of my determina- 

 tions, especially the former. 



The Great-St.-Bernard values exhibit very great irre- 

 gularities, giving a maximum in March, and a minimum 

 in August : the period from April to December is very 

 irregular, and does not conform to any regular progres- 

 sive increase or decrease in the amount of oscillation. 

 There can be little doubt that these values have been 

 determined from very few years^ observations. 



I have given these values, in order to show what has 

 been done previously on this point. 



Note. — It may be as well to state that the means for 

 the year, given in Tables VI., VII., and VIII., are not the 

 means of the twelve monthly values immediately above, 

 but have been determined by giving weight to each month 

 according to the number of observations from which its 

 values have been derived. 



