312 Proceedings of the Royal Irish Academy. 



X. — The system of jointing running N.W. by "W., from Tuppah. 

 to Putkee (eight miles), can be easily correlated with the two main 

 lines of direction by the intermediary of the angle of 80°. 



XI. and XII. — A line drawn at 70° with the Beluchistan coast 

 line great circle gives the direction of the jointing or bedding of 

 the patch of limestone occurring in the north-east of the field ; 

 while the well-marked joint or fault crossing the direction of these 

 limestones, from E.E". E. to W. S.W., makes with the direction of 

 the jointing which runs from Putkee to Tuppah an angle of 40°. 



The jointing which runs east and west, north of Tuppah, and its 

 parallel about one mile to the south of it, do not give any direct and 

 precise angular relation with either of the two principal directions 

 already mentioned. 



A few subordinate directions can also be correlated with those 

 directions, as shown on the map, but it is not necessary to insist on 

 them. 



It will thus be seen, that at least twelve different lines of direction 

 of jointing can be distinctly correlated with the two principal lines 

 employed — viz., the Beluchistan coast line, and the line which makes 

 40° with the east coast of India great circle — by simple angular 

 relations. 



There are a few main joints which are not so correlated, because 

 the angular relations which might be established would show differ- 

 ences of 4° to 5° with the theoretical values admitted : this so far goes 

 to show how distinctly the twelve other lines do concord with the 

 theoretical directions, and, therefore, so far go to support the general 

 theory of correlation submitted by me to the Royal Irish Academy. 



