

TRANSACTIONS 



OF THE 



EOYAL SOCIETY OF EDINBURGH. 



VOL. XXXVII. PART L— (Nos. 1 to 14)— FOR THE SESSION 1891-92. 



CONTENTS. 



I. The Chemistry of Strophanthidin, a Decomposition Product of Strophanthin. 



Feaseb, M.D., F.R.S., and Leonard Dobbin, Ph.D., .... 



II. Circular Magnetisation* accompanying Axial and Sectional Currents along Iron Tubes. 



Professor Cargill G. Knott, D.Sc., E.R.S.E. (With Plate), ... 7 



III. On the Number of Dust Particles in the Atmosphere of certain Places in Great Britain and on 



the Continent, with Remarks on the Relation between the Amount of Dust and Meteoro- 

 logical Phenomena. By John Aitken, F.li.S. (With Plate), . . . .17 



IV. On the New Star in the Constellation Auriga. By Professor Ralph Copeland, Astronomer- 



Royal for Scotland. Together with Observations of the Same. By Dr L. Becker. (With 



a Plate), . . . . . . . . . . 51 



V. The Lateral Sense Organs of Elasmobranchs. I. The Sensory Canals of Laemargus. By J. C. 

 Ewart, M.D., Regius Professor of Natural History, University of Edinburgh. (Plates 

 I. and II.), .......... 59 



VI. On the Lateral Sense Organs of Elasmobranchs. II. The Sensory Canals of the Common Skate 

 (Raia batis). By J. C. Ewart, M.D., Regius Professor of Natural History, and J. C. 

 Mitchell, B.Sc., University of Edinburgh. (Plate III.), . . . .87 



VII. On the Latest Phase* of Literary Style in Greece. By Emeritus Professor Blackie, . .107 



VIII. The Lower Carboniferous Volcanic Rocks of East Lothian (Carlton Hills). By Frederick II. 

 Hatch, Ph.D., F.G.S., of the Geological Survey. Communicated by Sir Archibald 

 Geikie, F.R.S. (With Two Plates), . . . . . .115 



IX. On the Glacial Succession in Europe. By Professor James Geikie, D.C.L., LL.D., F.R.S. , &c. 



(With a Map), 127 



X. On some Eurypterid Remains from the Upper Silurian Rocks of the Pentland Hills. By 



Malcolm Laurie, B.Sc, F.L.S. (With Three Plates), . . . . .151 



XL On Borolanite — an Igneous Rock intrusive in the Cambrian Limestone of Assynt, Sutherland- 

 shire, and the Torridon Sandstone of Ross-shire. By J. Horne, F-RS.E., and J. J. H. 

 Teall, F.R.S., of the Geological Survey. (Communicated by permission of the Director- 

 General of the Geological Survey. (With a Plate), ..... 163 



XII. On the Action of the Valves of the Mammalian Heart. By D. Noel Paton, M.D., F.R.C.P.E., 

 Superintendent of the Research Laboratory of the Royal College of Physicians. (With 

 Two Plates), .......... 179 



XIII. A Contribidion to the Anatomy of Sutroa. By Frank E. Beddard, M.A., Prosector to the 



Zoological Society of London. (With a Plate), . . . . . .195 



XIV. A Comparison of the Minute Structure of Plant Hybrids with that of their' Parents, and its 



Rearing on, Biological Problems. By J. Muirhead Macfarlane, D.Sc, F.R.S.E. 

 (Plates I.-VIIL), ' 203 



EDINBURGH: 



PUBLISHED BY ROBERT GRANT & SON, 107 PRINCES STREET, 

 AND WILLIAMS & NORGATE, 14 HENRIETTA STREET, COVENT GARDEN, LONDON. 



MDCCCXCIII. 

 (Issued February 17, 1893.) 



