Page 



A New Hypothesis concerning Vision. By John Berry Haycraft, 



M.D., D.Sc. [Title only] . - 78 



List of Presents 78 



March 9, 1893. 



On the Evidences of a Submergence of Western Europe, and of the 

 Mediterranean Coasts at the close of the Glacial or so-called Post- 

 Glacial Period, and immediately preceding the Neolithic or Recent 

 Period. By Joseph Prestwich, D.C.L., F.E.S., F.G.S., Corr. Inst. 

 France, &c 80 



The Electrolysis of Steam. By J. J. Thomson, M.A., F.E.S., Caven- 

 dish Professor of Experimental Physics in the University of Cam- 

 bridge , 90 



On the Geometrical Construction of the Qxygen Absorption Lines 

 Great A, Great B, and a of the Solar Spectrum. By George Higgs. 

 [Title only] 110 



Upon the Existence of more than one Fungus in Madura Disease 

 (Mycetoma). By Bubert Boyce, M.B., M.B.C.S., Assistant Professor 

 of Pathology, University College, London, and Nusserwangi Fakirgi 

 Surveyor, M.D., M.R.C.P 110 



List of Presents 112 



March 16, 1893. 



Croonian* Lecture. — The Position of Pathology among Biological 

 Studies. By Professor Rudolf Virchow, For. Mem. R.S 114 



March 23, 1893. 



On the Composition of Water by Volume. By Alexander Scott, M.A., 

 D.Sc, Jacksonian Demonstrator in the University of Cambridge 130 



On the Densities of the Principal Gases. By Lord Rayleigh, Sec. R.S. 134 



On the Variation of Surface Energy with Temperature. By William 

 Ramsay, Ph.D., F.R.S., and John Shields, B.Sc, Ph.D 150 



The Absolute Thermal Conductivities of Copper and Iron. By R. 

 Wallace Stewart, B.Sc. (Lond.), Assistant Lecturer and Demonstrator 

 in Physics, University College, Bangor 151 



Preliminary Notice on the Arrow Poison of the Wa Nyika and other 

 Tribes of East Equatorial Africa, with special reference to the Che- 

 mical Properties and Pharmacological Action of the Wood from which' 

 it is prepared. By Thomas R. Fraser, M.D., F.R.S., Professor of 

 Materia Medica in the University of Edinburgh, and Joseph Tillie, 

 M.D. (Edin.) 153 



List of Presents 160 



No. 323. 



Second Report of the Royal Society Water Research Committee. The 

 Vitality and Virulence of Bacillus anthracis and its Spores in Potable 

 Waters. By Percy F. Frankland, Ph.D., B.Sc, F.R.S., Professor of 

 Chemistry in University College, Dundee, and H. Marshall Ward, 

 D.Sc, F.R.S., F.L.S., Professor of Botany, Royal Indian Engineering 

 College, Coopers Hill 164 



