CONTENTS (continued). 



PAGE 



XII. Relations between the Atomic Weights and certain Physical Pro- 

 perties (Melting and Boiling Points and Heats of Formation) of 

 Elements and Compounds. By Thomas Carnellet, D.Sc, 

 Assistant Lecturer on Chemistry in Owens College, Manchester . 190 



XIII. Separate Enumerations of Primes of the Form 4<n + l and of the 



Form 4» + 3. By J. W. L. Glaisher, M.A., F.R.S., Fellow of 

 Trinity College, Cambridge 192 



XIV. On the Effects of Chloroform and Ether on the Radial Tracing. 



By C. Handheld Jones, M.B. Cantab, F.R.S 197 



XV. Preliminary Note on a new Tide-Predicfcer. By E. Roberts, 



F.R.A.S . . .198 



XVI. Double Refraction and Dispersion in Iceland Spar. An Expeii- 



mental Investigation with a Comparison with Huyghens' Construc- 

 tion for the Extraordinary Wave. By R. T. Glazebrook, M.A, 

 Fellow of Trinity College, Cambridge 202 



XVII. On the Vapour Densities of Potassium and Solium. By Professor 



James Dewar, M.A., F.R.S. , and Alexander Scott, B.A. . . 206 



XVIII. The Physical Properties of Liquid Acetylene. By Gerrard 

 Andsell, F.C.S., Chemical Assistant to the Roval Institution of 

 Great Britain . 209 



XIX. On the Origin of the Mineral, Strueturtil, and Chemical Characters 

 of Ophites and related Rocks. By Professors W. Kin 3-, Sc.D., and 

 T. H. Rowney, Ph.D 214 



XX. Note upon the Behaviour of Oxalic Acid and the Oxalates of the 

 Alkalies, and of Potassium Iodide in Sunlight. By Arthur Do wnes, 

 M.D., and Thomas P. Blunt, M.A., Oxon . . . . .219 



XXI. Preliminary Experiments on the Effects of Long-continued Stress 



on the Elasticity of Metals. By J. T. Bottomley, M.A., F.R.S.E. 221 



XXII. Note on the paper (read April 24) A Summary of an Inquiry into 

 the Function of Respiration at Various Altitudes on the Island and 

 Peak of Teneriffe. By William Marcet, M.D., F.R.S. . .226 



XXIII. Agricultural, Botanical, and Chemical Results of Experiments on 

 the Mixed Herbage of Permanent Meadow, conducted for more than 

 twenty years in succession on the same land. By J. B. Lawes, 

 LL.d", F.R.S., F.C.S., and J. H. Gilbert, Ph.D., F.R.S., F.C.S., 

 F.L.S 230 



XXIV. On the Comparative Structure of the Cortex Cerebri. By Bevan 

 Lewis, L.R.C.P. Lond., Assistant Medical Officer West Riding 

 Asylum, Wakefield 234 



XXV. An Account of Experiments on the Influence of Colloids upon 

 CrystalUne Form, and on Movements observed in Mixtures of 

 Colloids with Crystalloids. By William M. Ord, M.D. Lond., F.L.S. 238 



XXVI. Report to the Committee on Solar Physics on the Basic Lines 

 common to Spots and Prominences. By J. Norman Lockyer, 

 F.R.S 247 



XXVII. On a New Method of Studying Metallic Vapours. By J. Norman 



Lockyer, F.R.S 266 



