AND CORNWALL, AND THEIR MECHANICAL ORIGIN. 
System (X). 
409 
No. 
Bearing. 
Dip. 
Locality. 
1 
45 N. of E. 
so 
Carrickreagh, 
2 
45 „ 
90 
3 
45 
90 
„ 
4 
45 „ 
76 S.E. 
Dunbar. 
5 
45 
90 
Belmore. 
Mean 
45 0 N. of E. 
In these observations there is distinct evidence of a Primary and Secondary Conjugate 
System, and of a third series of planes (X), which is well represented in the Mourne 
Mountains. 
I. Primary System . . 
II. Conjugate to Primary 
III. Secondary System 
IV. Conjugate to Secondary 
V. (X) 
4° 30' S. of E. (Mag.) =21° 30' N. of. E. 
0° 12' E. of N. 
28° O' N. ofE. 
29° 20' W. of N. 
45° N. of E. . 
=25° 48' W. of N. 
= 54° 0'N. ofE. 
=r55° 20' W. of N. 
=19° 0'E. ofN. 
The angle between the Primary and Secondary Systems is thus found : 
A— A' ... 32° 30') „ , 
C— C' ... 29° 32') 31 1 ' 
Part Y.— GENERAL CONCLUSIONS FROM THE FOREGOING OBSERVATIONS. 
Collecting together into one Table the results of the preceding observations, we find 
the following : — 
Table X. — Primary and Secondary Joints (True Bearings). 
Waterford. 
Donegal. 
Mourne. 
Cornwall. 
Fermanagh. 
Primary System (A) j 
Conjugate to Primary (C) ... <j 
First Secondary (A') <j 
Conjugate to First Secondary 1 
(C') ..1 
Second Secondary (A") <j 
Conjugate to Second Secondary 
(C") , y < 
r 
r 
r 
F 
r 
N. of E. 
32° 26' 
W. of N. 
31° 37' 
N. of E. 
58° 11' 
W. of N. 
60° 3' 
S. of E. 
5° 50' 
E. of N. 
4° 30' 
N. of E. 
26 ° 16' 
W. of N. 
29° 35' 
N. of E. 
58° 40' 
N. of E. 
39° 40' 
W. of N. 
38° 31' 
N. of E. 
70° 40' 
W. of N. 
70° 40' 
W. of N. 
7° 35' 
N. of E. 
32° 34' 
W. of N. 
32° 55' 
( 
1 
N. of E. 
4° 0' 
W. of N. 
6 ° 30' 
N. of E. 
21° 30' 
W. of N. 
25° 48' 
N. of E. 
54° 0' 
[and 71° O'] ? 
W. of N. 
55° 20' 
The only remarkable agreement as to direction of Joints disclosed by the preceding 
3 1 2 
