PROCEEDINGS 



EOYAL IRISH ACADEMY. 



SCIEIVCE. 



YoL. III., Ser. II.] DECEMBER, 1880. [No. 5. 



CONTENTS. 



PA OK 



XLVII.— Mathematical Notes. By A. H. Anglin. (Abstract), . . . 2S9 

 XL VIII. — On the Satellite of a Line meeting a Cubic. By William 



R. ROBEETS, M.A., . 29^ 



XLIX. — On the Directions of Main Lines of Jointing observable in the 

 Rocks about the Bay of Dublin, and their Relations with adja- 

 cent Coast Lines. By J. P. O'Reilly, c.e., Professor of Mining 

 and Mineralogy, Royal College of Science, Ireland, . ." . . 295 

 L. — On the Correlation of the Lines of Faulting of the Palamow Coal- 

 field District, Northern India, with the neighbouring Coast 

 Lines. By J. P. O'Reillt, c.e.. Professor of Mining and 



Mineralogy, Royal College of Science, Ireland, .310 



LI. — Preliminary Report on some New Organic Nitroprussides. By 

 Edmund W. Datx, a.m., m.d., m.e.i.a., Professor of Forensic 

 Medicine, Royal CoUege of Surgeons, Ireland, &c., .... ol'i 



LII. — Preliminary Notice of a Memoir on Rock-jointing, in its relation 

 to Phenomena in Physical Oleography and Physical Geology. 

 By PiiOE. Wm. KiNCf, sc.D., &c. (Abstractby the Author), . 326 



LIII. — On some Anomalous Structures in Human Anatomy. By J, F. 

 Knott, e.e.c.s.i., L.E:.a.c.p.r., Demonstrator of Anatomy, 

 Royal CoUege of Surgeons, Ireland, '.i'-i'I 



LIV. — Note on the Occurrence of a Premaxill a- frontal Suture in the 

 Skull of the Koalla [Phascolarctos cinereus). By H. W. 

 Mackintosh, Professor of Zoology, Trinity College, Dublin. 



(With Plates 10 to 13), 335 



LV. — Eurites, or Basic Felstones of Silurian Age. By G. H. Kinahan 



and Geeeakd A. Kinahan, 338 



LVI. — Supposed Upper Cambrian Rocks in the Counties of Tyrone and 



Mayo. By G. H. Kinahajs^, m.e.i.a., &e., .343 



Minutes of Proceedings, April 12 to June 28, 1880, 147 to 154 



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