34$ Mr. Christie on the diurnal deviations of the 
At n h 45 111 P. M. the north end of the needle had settled at 
N o° 04/ E; and on the following day I observed as follows, 
noting the direction which the needle had assumed between 
the observations, and likewise the point where it settled, 
after it had been agitated by gently tapping the compass- 
box. 
Direction of the N. end. 
5th April. 
When first 
Observed. 
After agitating 
the Needle. 
Morning, 
h. m. 
0 / 
O / 
7 00 
— 0 04 
— O 12 
7 35 
— 0 46 
~o 54 
8 10 
—0 30 
— O 56 
8 35 
— 0 50 
— I OO 
9 ! 5 
— 7 l6 
— O 46 
10 00 
— O 20 
— O 20 
10 35 
— O IO 
O OO 
1 1 05 
O 06 
4-0 06 
0 05 
4-0 32 
4-0 42 
0 30 
4- 1 00 
4-0 58 
1 00 
4- 1 00 
4-0 58 
1 3 ° 
4- 1 00 
4-0 56 
2 00 
4- 1 02 
4-0 58 
4 15 
4-0 26 
0 00 
8 45 
0 00 
0 00 
Here the times of the greatest easterly deviation in the 
morning, and of the westerly in the afternoon, correspond 
with the preceding observations, but the easterly appears much 
greater, compared with the westerly, than I had before ob- 
served. I had intended to continue observing for several days 
with the present adjustment of the needle, but being still not 
quite satisfied that the needle moved freely on the point of 
suspension, I carefully polished the inside of the agate cap, 
and also the point on which it rested, preparatory to the ob- 
servations of the next day. As I found, after I had done 
this, that the needle settled with great precision, in order to 
obtain rather larger arcs of deviation, I adjusted the magnets 
