V 



May 17, 1888. 



Page 



On the Electromotive Properties of the Leaf of Dioncea in the Excited 

 and Unexcited State. No. II. By J. Burdon Sanderson, M.A., M.D., 

 F.K.S., Professor of Physiology in the University of Oxford 202 



Magnetic Qualities of Nickel. By J. A. Ewing, F.K.S., Professor of 

 Engineering, University College, Dundee, and G. C. Cowan 204 



On the present Position of the Question of the Sources of the Nitrogen 

 of Vegetation, with some new Results, and preliminary Notice of New 

 Lines of Investigation. By Sir J. B. Lawes, F.R.S., and J. H. 

 Gilbert, M.A., LL.D., F.R.S., Sibthorpian Professor of Rural Economy 



in the University of Oxford 205 



On the Rhythm of the Mammalian Heart. By J. A. McWilliam, M.D., 

 Professor of the Institutes of Medicine in the University of Aberdeen 206 



Inhibition of the Mammalian Heart. By John A. McWilliam, M.D., 

 Professor of the Institutes of Medicine in the University of Aberdeen 208 



On the Structure of the Electric Organ of Rata circularis. By J. C. 

 Ewart, M.D., Regius Professor of Natural History, University of 

 Edinburgh 213 



On ^Eolotropic Elastic Solids. By C. Chree, M.A., Fellow of King's 

 College, Cambridge 214 



List of Presents 218 



May 28, 1888. 



The Croonian Lecture. — Ueber die Entstehung der Vitalen Bewegung. 

 By Professor W. Kuhne, of Heidelberg 220 



May 31, 1888. 



On the Effect of Occluded Gases on the Thermo-electric Properties of 

 Bodies, and on their Resistances ; also on the Thermo-electric and other 

 Properties of Graphite and Carbon. By James Monckman, D.Sc 220 



Colour Photometry. Part II. The Measurement of Reflected Colours. 

 By Captain W. de W. Abney, R.E., F.R.S., and Major-General Festing, 

 R.E., F.R.S 237 



The Conditions of the Evolution of Gases from Homogeneous Liquids. 

 By V. H. Veley, M.A., University College, Oxford „ 239 



Investigations on the Spectrum of Magnesium. No. II. By G. D. 

 Liveing, M.A., F.R.S., Professor of Chemistry, and J. Dewar, M.A., 

 F.R.S., Jacksonian Professor, University of Cambridge 241 



List of Presents 253 



No. 269. 



On the Coagulation of the Blood. Preliminary Communication. By 

 W. D. Halliburton, M.D., B.Sc, Assistant Professor of Physiology, 

 University College, London 255 



