302 



Magnetical Olservations. 



[Oct. 



Magnetical Olservations continued. 







In deducing the mean variation for the month of August the 

 observations made on the 1st are rejected, on account of then- 

 differing so much from the olhers. On the 6th September the 

 wind blew very hard from the S.W. and the needles at inter- 

 vals vibrated from four to five minutes. Does not, therefore, 

 the unsteadiness of the wind arise partly from electricity ? It is 

 not every gust of wind that will produce a vibratory motion. 



Rain fallen 



< Between noon of the 1st Ang 

 ( Between noon of the 1st Se 



pt.J 



597 inches. 



Evaporation between the same periods, 2 ,r i0 inche?. 



