1 62 
FIFTH REPORT- 1835. 
Place. 
(wa 2 ) 
(w a b) 
(w 6 2 ) 
(w a c ) 
(u> b c ) 
Cara . 
1156 
— 3876 
12996 
-t .5236 
-1-7566 
Strabane. 
1764 
— 3696 
7744 
+ *4284 
- -8976 
Armagh ......... 
392 
— 1680 
7200 
+ *1260 
— -5400 
Belmullet ...... 
15625 
- 7375 
3481 
+ 1*1875 
- -5605 
Markree . 
5929 
— 4081 
2809 
+ -7161 
- -4929 
Ballina. 
9604 
— 4802 
2401 
+ -7742 
- -3871 
Achill Ferry. 
16129 
- 4953 
1521 
+ 1-2446 
— -3822 
Galway . 
8649 
+ 372 
16 
+ -8184 
+ -0352 
Rath drum ...... 
4 
— 52 
67 6 
+ *0114 
— -1482 
Tulla .. 
7744 
+ 2464 
784 
+ *6776 
+ *2516 
Ennis .. 
9216 
+ 2784 
841 
+ -5376 
+ -1624 
Limerick ... 
28900 
+ 13940 
6724 
+ 1-3940 
+ -6724 
Gorey .. 
0 
+ 6 
1600 
+ -0000 
— -2720 
Ballybunan ...... 
14641 
+ 5566 
2116 
+ 1-5367 
+ -5842 
Broadway . 
9 
+ 201 
4489 
- -0075 
— .1675 
Waterford .. 
961 
+ 2139 
4761 
— *1085 
- -2415 
Dingle .. 
22500 
+ 11250 
5625 
+ 2-1000 
+ 1-0500 
Valentia .. 
21316 
+ 12410 
7225 
+ 1-2994 
+ -7565 
Cork ... 
6889 
+ 7221 
7569 
— -0664 
— -0696 
Youghal ......... 
6962 
+ 10384 
15488 
+ *1298 
+ -1936 
By addition we obtain 
S (w a 2 ) = 178390, S (wab)- + 38216, S (w b 2 ) =s 96066, 
S (w a c) s= + 13*3229, S (w b c) = — 2*2448. 
The final equations therefore are 
178390 x + 38216 y = + 13*3229, 
38216 x + 96066 y = - 2*2448 ; 
from which we obtain, by elimination, 
a; = +*00008711, y — — *00005802. 
Consequently, 
tan w = - *6661, w = - 33° 40', t = *0001047= 
The lines of total intensity thus deduced are laid down in 
the annexed chart for differences of *005, these differences corre¬ 
sponding to intervals of 47*6 geographical miles. It will be 
seen that their direction diverges widely from that of the lines 
of dip ; and although the position of the two classes of lines 
may need further correction, it does not seem likely that such 
correction will have the effect of diminishing, at least by any 
considerable amount, the divergence. 
