35® Mr. Christie on the diurnal deviations of the 
Table of the Diurnal Deviations of a Magnetic Needle having the 
North end held in equilibrio , at South by two bar Magnets placed 
in the line of the Dip. 
April 
20 
21 
22 
23 
24 
25 
26 
27 
Mean 
h. m. 
0 / 
0 , 
O / 
0 / 
° £ 
0 / 
0 / 
0 t 
5 00 
_ 
— 
— 
— 
4- 2 26 
— 
4- 2 38 
+ 2 48 
5 3 ° 
— 
— 
— • 
— 
4- 2 26 
— 
4- 2 50 
4- 3 02 
6 00 
— 
— 
4- 1 20 
— 
+ 2 42 
— 
4- 2 58 
4- 3 06 

7 00 
4 1 22 
+ 212 
4 1 44 
+ 1 46 
+ 2 50 
4- 2 48 
+ 3 3 ° 
+ 3 3 ° 
4- 2 19 
7 3 ° 
a— 
+ 2 30 
4 1 5 6 
+ 1 52 
4- 3 02 
4- 2 48 
+ 3 34 
+ 3 48 
+ 2 37 
8 00 
4 I 28 
— 
4- 2 02 
4- 2 08 
4- 3 02 
+ 2 44 
4 3 36 
4 3 56 
+ 2 30 
8 30 
— 
— 
4- 2 04 
4- 1 56 
— 
> — 
+ 3 36 
4- 4 oo 
9 00 
-f I 08 
+ 218 
4 » 24 
4 > 4 ° 
+ 2 38 
4- 2 36 
4 3 18 
4 3 54 
4- 2 09 
10 00 
+ O 08 
4 1 24 
4- 0 56 
4- 1 20 
+ 1 34 
+ 1 4 2 
+ 2 36 
4-258 
4 1 23 
11 00 
O 22 
+ 0 02 
— 0 02 
4 ° 44 
— 
4- 0 36 
4- 1 28 
4 - 1 4 2 
4 0 24 
Noon 
O 56 
— 1 06 
1 
0 
0 
4- 0 26 
4 - 0 26 
4- 0 22 
4- ° 44 
4- 0 48 
— 0 06 
0 30 
I 12 
— 1 10 
— 
— 
— 
4-016 
+ 0 34 
4- 0 48 
— 
1 00 
I 24 
— 
1 
0 
4- 
0 
4-0 12 
4- 0 06 
4-010 
4-022 
4 - 0 44 
— 012 
1 30 
-I 20 
— 1 40 
— 
— 
— 0 06 
— 
-f 0 26 
— 
— 
2 00 
1 OO 
— 
~i 00 
4-010 
— 0 02 
— 0 14 
4 0 52 
4- 1 00 
— 0 12 
3 00 
1 
O 
- 4 - 
— 0 34 
— 0 44 
4- 0 28 
4- 0 06 
4- 0 44 
4-1 12 
4- 0 05 
4 00 
— 
— 0 20 
4- 0 20 
4- 0 06 
4- 0 22 
4- 1 20 
4- 2 40 
2 -ri 
4 0 45 
5 00 
— 0 12 
+ 0 08 
— 0 14 
-f- 1 00 
4- 0 42 
+ 1 5 Z 
4- 2 28 
Si 
4 0 49 
6 00 
— 0 14 
— 028 
4 - ° 24 
4 - 0 40 
+ 1 20 
4- 2 06 
4- 3 02 
■sl 
4 0 59 
7 00 
0 00 
40 22 
4- 0 02 
+ 1 36 
4- 1 18 
4- 2 c6 
-f 3 10 
u a 
4 1 13 
8 00 
— 
+ 0 14 
4- 0 18 
4 1 42 
4-1 12 
4- 2 00 
4- 2 50 
<D O 
c/J 0 
4 i 23 
9 00 
0 00 
0 CO 
4-016 
4 - 1 40 
4 1 46 
4 1 54 
4-252 
O -3 
4 1 13 
10 00 
4- 0 04 
— 0 06 
4- 0 26 
+ 1 4 ° 
4 1 5 6 
-f 2 02 
4- 2 40 
4 1 IS 
11 00 
- 
0 00 
+ 0 32 
4 1 38 
4 1 54 
4 2 00 
4- 2 40 
4 1 27 
As there are not corresponding observations on all the 
days, and there appears to be a considerable change in the 
point which should be considered as zero, a very correct 
mean of all the observations cannot be taken ; but I have 
adopted that which embraces the greatest number. I exclude 
the observations of the 27th, as not carried through the whole 
day, and of the others, I take the means of those at the 
several hours on which there were observations for at least 
six days. 
