CONTENTS. 



PART I. (1891-92.) 



NUMBEU PAGE 



I. The Chemistry of Strophanthidin, a Decomposition Product of Strophan- 

 thin. By Thomas R. Fraser, M.D., F.R.S., and Leonard Dobbin, 

 Ph.D., 1 



II. Circular Magnetisations accompanying Axial and Sectional Currents 

 along Iron Tubes. By Professor Cargill G. Knott, D.Sc, F.R.S.E. 

 (With a 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 Meteorological Phenomena. By John 

 Aitken, F.R.S. (With a Plate), . . . . .17 



IV. On the New Star in the Constellation Auriga. By Professor Ralph 



Copeland, Astronomer-Royal for Scotland. Together with Observa- 

 tions of the Same. By Dr L. Becker. (With a Plate), . . 51 



V. The Lateral Sense Organs of Elasmobranchs. I. The Sensory Canals of 

 Lcemai'gus. 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 



