NO. 7.] 



DECLINATION. 



31 



After this reading the revolver was placed 

 alternately E and W of the foot in a ver- 

 tical position with the butt-end down, 

 without producing any change in the 

 readings. 8 ) The needle trembled consider- 

 ably. 6 ) The mirror dipping during this 

 reading. 



!) The needle quiet at the moment of 

 setting. s ) Somewhat disturbed. 8 ) Quiet. 

 4 ) Quiet; at first disturbed with about 45' 

 higher reading. 6 ) Fairly quiet. 6 ) The 

 needle first made a somewhat marked 

 movement eastwards, then returned, and 

 the setting was made. 7 ) Disturbed. 



