CONTENTS. 

 VOL. XXXVIII. 



No. 235.— December 11, 1884. 



Page 



The Absorption-spectra of the Alkaloids. By W. N. Hartley, F.R.S., 

 Professor of Chemistry, Royal College of Science, Dublin 1 



On the Function of the Thyroid Gland. By Professor Victor Horsley, 

 B.S., M.B., F.R.C.S 5 



On the Development of the Arteries of the Abdomen and their Relation 

 to the Peritoneum. By C. B. Lockwood 8 



On the Occurrence of a Hydroid Phase of Limnocodium Sowerbii, Allman 

 and Lankester. By Alfred Gibbs Bourne, Assistant Professor of 

 Zoology in University College, London 9 



December 18, 1884. 



On the Evidence of Fossil Plants regarding the Age of the Tertiary 

 Basalts of the North-East Atlantic. By J. Starkie Gardner 14 



Note on the Later Stages in the Development of Baldnoglossus Kowalevskii 

 (Agassiz), and on the Affinities of the Enteropneusta. By William 

 Bateson, B.A., Scholar of St. John's College; Cambridge 23 



On Reflex Excitation of the Cardiac Nerves in Fishes. By J. A. 

 McWilliam, M.D., Demonstrator of Physiology, University College, 

 London. From the Physiological Laboratory, University College 31 



The Influence of Stress and Strain on the Physical Properties of Matter. 

 Part I. Moduli of Elasticity— continued. The Viscosity of Metals. 

 By Herbert Tomlinson, B.A. : 42 



Professor Malet's Classes of Invariants identified with Sir James Cockle's 

 Criticoids. By the Rev. Robert Harley, F.R.S 45 



January 8, 1885. 



Experimental Researches in Magnetism. By Professor J. A. Ewing, 

 B.Sc, F.R.S.E., University College, Dundee 58 



On certain Definite Integrals. No. 12. By W. H. L. Russell, F.R.S 62 



