98 PROCEEDINGS OF SOCIETIES. 



He details accurately the different steps of the Creation (except that 

 he could not be aware of the important recent discoveries in the Cam- 

 brian strata), and shows how everything came in its regular order until 

 the creation of man. It is a most valuable addition to our works on 

 Natural Theology ; and I trust that so much progress has been made in 

 our science, that neither the enemies of Revealed Religion, nor the almost 

 equally dangerous advocates of untenable interpretations of the Bible, 

 will be able to rest their arguments on the unsoundness or contradictions 

 of geological theories. 



WEDNESDAY EVENING, MARCH 11, 1857. 



Dr. Croker in the Chair. 



The Society met on the above evening, when the following gentlemen 

 were elected members r — 



L Alexander Tate, Esq., C.E., Santry; 2. Geo. Phayre, Esq., C.E., 

 Sandymount. 



The reading of Mr. John Kelly's paper on the Subdivision of the 

 Carboniferous Eormation in Ireland was continued, and the discussion to 

 which it gave rise was postponed until the meeting in the month of 

 ApriL 



The Rev. Professor Haughton also communicated the following — 



NOTES TO ACCOMPANY FIGURES OF SOME DISTORTED FOSSILS FROM THE 

 CLEAVED ROCKS OF THE SOUTH OF IRELAND. 



In a short paper published by me in the "Philosophical Magazine" for 

 December, 1856, on Slaty Cleavage and Distortion of Fossils, I have es- 

 tablished the following laws from measurements made on fossils dis- 

 torted by cleavage : — 



1st Law. — If the trace or intersection of the plane of cleavage and 

 plane of bedding be drawn, the greatest distortion or elongation of the fossils 

 lying in the plane of bedding is parallel to this intersection. (Page 410.) 



2nd Law. — The distortion of fossils produced by cleavage, estimated in 

 a given direction, such as parallel to the intersection of the planes of clea- 

 vage and bedding, varies with the angle between these planes, being greatest 

 when the angle is greatest, and least when the angle is least. (Page 411.) 



3rd Law. — The compression in a cleaved rock is greatest in a direction 

 perpendicular to the planes of cleavage. 



As many persons, not familiar with the appearance of fossils distorted 

 by cleavage, have felt some difficulty in following the argument of that 

 paper, I have thought it desirable to give to this Society a few illustra- 

 tions of the distorted fossils of the south of Ireland. 



I should first premise that in the two plates containing the figures 

 of the fossils the horizontal line is supposed to be the intersection of the 

 planes of cleavage and bedding, and the vertical line is the dip of the 

 bedding in most instances, and never deviates far from that line. 



