PROCEEDINaS 



ROYAL IRISH ACADEMY. 



S OIEHSrCE 



Ser.1i., Yoi,.iY.] JULY, 1884. [No. 2. 



CONTENTS. 



PAGE 



VI. Notes on Microphotographic Methods. By E,ichaed A. Hates, m.d., 59 

 VII. On the Geometrical Properties of the " Atriphthaloid." By the 



Rev. EicHAKD Townsend, m.a., s.p.t.c.d., 62 



VIII, Critical and Literary Remarks on Euclid's Doctrine of Parallel Lines. 



By Ret. Samtjel^Haughton, m.d., e.e.s., s.e.t.c.d., 71 



IX. On the Heights attained by Plants on Ben Bulben. By the late 



Thomas Hughes Cokhx, m.a., e.l.s., 73 



X. On a Mode of Sub-aqueoiis Tunnelling. By SiE, Samuel Ferguson, 



ft.c, LL.D., President, 78 



XL Report on the Botany of the Island of Rathlin, County of Antrim. 

 By Samuel A. Stewaet, Fellow of the Botanical Society of Edin- 

 burgh, Curator of the Collections in the Museum of the Belfast 



Natural History and Philosophical Society, 82 



XII. Report on Irish Lepidoptera. By W. F. DeV. Kane, m.a., . , . 105 



XIII. On the Directions of Main Lines of Jointing observable in the Rocks 



about Dublin, and their Relations with adjacent Coast Lines, and 

 with Lines of Faulting and Contact of Geological Formations. 

 (Part II.) By J. P. O'Reilly, c.e., Professor of Mining and Mi- 

 neralogy, Royal College of Science, Dublin. (Plate L), .... 116 



XIV. A Catalogue of Known Variable Stars. With Notes and Observa- 



tions. By J. E. Goee, M.K.I.A., F.E.A.S., Honorary Member of the 

 Liverpool Astronomical Society, 149 



Minutes of Proceedings, December 10, 1883, to April 28, 1884, . . . 263 to 278 



Absteacx oe the Accounts from April 1, 1883, to March 31st, 1884. 



List of Membees. 



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