Observations of Magnetic Dip, August 1 — November 9, 1844. 



163 



* Observations considered good. f Observations considered bad or doubtful. 



Sept. 5<i— 6J. The dip deduced for needle No. 1. has been obtained by applying a correction of .51'-09 to the mean A dippiiiiT ■ the 

 correction being half the difference of the observations for A and for B dipping, made July Su-i and Sept. lO-i. 

 Oct. 31-1. Before this observation the level of the instrument was adjusted. 

 Nov. 7''. Unsatisfactory observation ; the instrument quite damp, and the needle scarcely ceases to vibrate. 



