



TRANSACTIONS 



OF THE 



ROYAL SOCIETY OF EDINBURGH. 



VOL. XXXVII. PART II.— (Nos. 15 to 24)— FOR THE SESSION 1892-93. 



CONTENTS. 



PAGE 



XV. The Skull and Visceral Skeleton of the Greenland Shark, Laemargus tnicrocephalus. J'>y 

 Philip J. White, M.B., Demonstrator of Zoology, University of Edinburgh. Communi- 

 cated by Professor Ewakt. (With Two Plates), ...... 287 



XVI. (Jit, the Fossil Plants oj the Kilmarnock, Galston, and Kilwinning Coal Fields, Ayrshire. 



By Robert ivinsTox, F.R.S.E., F.G.S. (Plates I.-IV.), . .... 307 



XVII. Electrolytic Synthesis of Dibasic Acids. By Professor A. Csufi Brown and Dr James 

 Walker. IT. On the Electrolysis of the Ethyl-Potassium Sail* of Saturated Dibasic 

 Ar.ii/.-; with Side Chain*, and on Secondary Reactions accompanying the Electrolytic 

 Synthesis of Dibasic Acids, . . . . . . . . - .'3G1 



XVII 1. On Imparl, II. By Professor Tait, . . . . . . .381 



XIX. A New Algebra, by means of whicJi Permutations ran be transformed in a variety of ways, 



and their properties investigated. By T. B. Sprague, M.A., F.R.S.E., . . . o!)t) 



XX. On the Particle* in Fogs and Cloud*. By John Aitkex, Esq., F.R.S., E.R.S.E., . . IP'S 



XXL On the Path of a Rotating Spherical Projectile. By Professor Tait. (With a Plate), . 427 



XXII. On the Pres< nt Slide of Knowledge and Opinion in regard to Colour-Blindness. By William 

 Pole, F.R.S., F.R.S.E., Mus. Doe. Oxon., Honorary Secretary of the Institution of Civil 

 Engineers. (With a Plate), ........ Ill 



XXI I I. On tfu Chemical Change* which take place in the Composition of theSea-Water associated 



ivith Blue Muds on the Floor of the Ocean. By John Murray, LL.D., Ph.D., and , 

 Robert Irvine, F.C.S., ......... 181 



XXIV. Tin Anatomy and Relations of tlie Eurypterida. By Malcolm Laurie, B.Sc., B.A., E.L.S. 



Communicated by R. 11. Traquair, M.I)., F.R.S., F.R.S.E. (With Two Plates), . 509 



EDINBURGH: 



PUBLISHED BY ROBERT GRANT & SON. 107 PRINCES STREET, 

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



MDCCCXCIII. 



(Issued November J. 189,3.) 



