158 
FIFTH report—1835. 
Place. 
O 2 )* 
(ab) 
(* 2 ) 
(a c ) 
(b c ) 
Belmuliet . 
15625 
- 7375 
3481 
+ 8562 
—4041 
Markree .. 
5929 
— 4081 
2809 
+ 4774 
-3286 
Ballina. 
9604 
— 4802 
2401 
+ 6468 
—3234 
Achill Ferry ... 
16129 
— 4953 
1521 
+ 7816 
-2398 
Galway . 
8649 
+ 372 
16 
+2604 
+ 112 
Rathdrum . 
4 
- 52 
676 
+ 23 
- 299 
1 Tulla ... 
7744 
+ 2464 
784 
+ 2112 
+ 672 
Ennis . 
9216 
+ 2784 
841 
+ 768 
+ 232 
Limerick. 
7225 
+ 3485 
1681 
- 170 
- 82 
Gorey . 
0 
+ o 
1600 
+ o 
— 360 
Ballybunan. 
14641 
+ 5566 
2116 
+ 1936 
+ 736 
Broadway . 
9 
+ 201 
4489 
- 87 
-1943 
Waterford . 
961 
+ 2139 
4-761 
- 449 
-1000 
Dingle. 
22500 
+ 11250 
5625 
+ 750 
+ 375 
Valentia . 
21316 
+ 12410 
7225 
+ 292 
+ 170 
Cork . 
6889 
+ 7221 
7569 
— 1826 
— 1914 
Youghal . 
3481 
+ 5192 
7744 
-1416 
—2112 
Summings we find; 
S (a 2 ) = 149922; S (a b ) = + 31821; S (b 2 ) = 55339; 
S (o c) = + 32157; S {be) = - 18372 ; 
so that the final equations are 
149922 x + 31821 y = + 32157, 
31821a? + 55339?/ = - 18372. 
From these we deduce 
x = + *3250; y = — ‘5196; 
tan v — — 1-599; v — 57° 59', 
5 = -613. 
It would appeaiq then; that the angle which the isoclinal lines 
in Ireland make with the meridian is on the increase; a result 
which is in conformity with the general progress of these lines; 
as inferred from a comparison of recent observations with those 
of an earlier date. 
For the mean of the two years; 
x = 4- *3239; y = — *4950; 
tan?; == — 1'528; v = — 56° 48'; 
5 = *592. 
The lines in the annexed chart are deduced from these last 
results j and it appears from them that the interval of the 
* We have assumed that w 1 , for all the results obtained in this year. 
