THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Vol. VII. (I. S.) JUIE, 1891. Part 2. 



CONTENTS. 



PAGE 



YIII. — A New Species of Tortiix from Tuam. By GrEo. H. Caepentek, 

 B.Sc, Assistant Naturalist in the Science and Art Museum, 

 Dublin. Plate VII., 91 



IX. — On a Greometrical Method of finding the most probable Apparent 

 Orbit of a Double Star. By Aethur A. Kambatjt, M.A. Plates 

 Tin. and IX 95 



X. — On a Combination of Wet and Dry Methods in Chemical Analysis. 

 Parti. By W. E. Adenet, F.I.C, Assoc. R.C.Sc.I., Curator, 

 Royal University of Ireland ; and T. A. Shegog, A.I.C, Assoc. 

 R.C.Sc.I., Assistant Chemist, Royal College of Science, Dublin, 99 



XI. — The Variolite of Ceryg Grwladys, Anglesey. By Geentille A. J. 

 Cole, F.G-.S., Professor of Geology, Royal College of Science, 

 Dublin. Plate X., 112 



XII. —Survey of Fishing Grounds, West Coast of Ireland. Preliminary 

 Note on the Fish obtained during the Cruise of the SS. "Fingal," 

 1890. By Ernest W. L. Holt, 121 



XIII. — The Origin of certain Marbles : A Suggestion. By Professors 



SoLLAS and Cole, 124 



List op Scientific Publications, 1-4 



The Authors alone are responsible for all Opinions expressed in their Communications. 



DUBLIN: 



PUBLISHED BY THE EOYAL DUBLIN SOCIETY. 



LONDON: WILLIAMS & NORGATE, 14, HENRIETTA- STREET, 



COVENT GARDEN. 



1891. 



Price One Shilling and Sixpefcce-^^ ' j h- K) d r (q ,. '-''/^ 



