MAGNETICAL OBSERVATIONS IN IRELAND. 
153 
Table VII. 
Place. 
(*) 
GO 
(X-A,) 
O -<“/) 
COS X 
(j - iy 
(*-*,) 
(/ -/,) 
Carn . 
O / 
55 15 
o / 
7 15 
+ 114 
+ 34 
+ 54-9 
- -030 
+ •0154 
Colerain . 
55 8 
6 40 
+ 107 
+ H 
+ 21-0 
- -009 
—0003 
Strabane . 
54 49 
7 28 
+ 88 
+ 42 
+ 54-0 
— -033 
+ •0102 
Enniskillen ... 
54 21 
7 38 
+ 60 
+ 48 
+ 54-0 
— -031 
Armagh. 
54 21 
6 39 
+ 60 
+ 14 
+ 36-3 
— -021 
+ •0045 
Belmullet . 
54 20 
9 50 
+ 59 
+ 125 
+ 68-5 
— ’050 
+ •0095 
Markree . 
54 14 
8 28 
+ 53 
+ 77 
+ 61-8 
— -039 
+ •0093 
Ballina . 
54 10 
9 3 
+ 49 
+ 98 
+ 66-0 
— *045 
+ •0079 
Carlingford ... 
54 2 
6 11 
+ 41 
- 3 
+ 24-2 
- -010 
+ •0169 
Achill Ferry ... 
54 0 
9 51 
+ 39 
+ 127 
+ 6L5 
— *042 
+ •0098 
Leenan . 
53 41 
9 40 
+ 20 
+ 121 
— -036 
Oughterard ... 
53 27 
9 18 
+ 6 
+ 109 
- -022 
Dublin . 
53 21 
6 15 
+ o 
+ 9 
+ 00 
+ *000 
+ •0000 
Galway . 
53 17 
8 51 
— 4 
+ 93 
+ 27-9 
+ •0088 
Rath drum. 
52 55 
6 12 
- 26 
— 2 
— 11-5 
+ -001 
-•0057 
Tulla* . 
52 53 
8 41 
— 28 
+ 88 
+ l?8 
+ -003 
+ •0077 
Ennis. 
52 52 
8 54 
- 29 
+ 96 
+ 8-2 
— 002 
+ •0056 
Limerick*. 
52 40 
8 36 
- 41 
+ 85 
+ 5-0 
+ *005 
+ .0041 
G’crey . 
52 41 
6 15 
- 40 
+ o 
- 9-2 
-.0068 
Clonmel . 
52 20 
7 41 
- 61 
+ 53 
+ -013 
Ballybunan ... 
52 35 
9 34 
— 46 
+ 121 
+ 16-3 
+ -004 
+ •0127 
Broadway . 
52 14 
6 20 
- 67 
+ 3 
— 290 
+ -021 
-•0025 
Waterford. 
52 12 
7 6 
- 69 
+ 31 
— 14'5 
+ -010 
— 0035 
Dingle . 
52 6 
10 20 
— 75 
+ 150 
+ 4-9 
+ •0140 
Killarney . 
52 3 
9 31 
- 78 
+ 121 
+ 6'5 
+ -Oil 
Fermoy. 
52 1 
8 34 
— 80 
+ 86 
— 17*7 
+ -019 
Valentia. 
51 56 
10 12 
— 85 
+ 146 
+ 2-2 
+ •0089 
Cork . 
51 54 
8 28 
- 87 
+ 83 
- 21-9 
+'•019 
-•0008 
Youghal. 
51 53 
7 51 
— 88 
+ 59 
-23-8 
+ .0011 
Glengariff . 
51 44 
9 33 
- 97 
+ 123 
+ 3-5 
+ +11 
The equations of condition (E) are of the first dimension with 
respect to the two unknown quantities they contain, and may be 
written 
a x + b y = c; (F) 
in which the values of a, b , and c (or of (p — <q) cos A, A — A /? 
and h — h p ) are given in the preceding table. In order to deduce 
the most probable values of the two unknown quantities, these 
equations must be combined by the method of least squares. 
Accordingly, multiplying equation (F) by the coefficient of x ( a ), 
* Observations made in the rear 1835 give Tulla § — ^ + 23 f, 7 ; Limerick, 
* — &, = — 2 '* 1 . 
