LI 



stone as an Index of Geological Time. J. Norman Lockyer: Preli- 

 minary Note on the Substances wMch produce the Chromosplieric Lines. 

 G. F. Rodwell and H. M. Eid er: On the Effect of the Di-iodide of 

 Mercury, HgJa. Balfour Stewart and Marisabro Hiraoka : A 

 Comparison of the Variations of the Diurnal Hange of Magnetic Decli- 

 nation as recorded at the Observatories of Kew and Trevandrum. Her- 

 bert Mc. Leod and George Sydenham Clarke . On the Determi- 

 nation of the Rate. C. William Siemens: On certain means of 

 Measuring and Regulating Electric Ciirrents. 

 Vol. XXVIII. Nr. 193. 

 Osborne Reynolds: On certain Dimensional Properties of Matter 

 in the Gaseons State. Part I. and Part II. R. Agnus Smith: Absorption 

 of Gases by Chareoal. Part IL A. Milnes Marshall: Note on the 

 Development of the Olfactory Nerve and Olfactory Organ of Vertebrates. 

 W. K. Parker: On the Development of the Skull and its Nerves in the 

 Green Turtle (Chelone midas), with Remarks on the Segmentation seen 

 in the Skull of various types. J. E. H. Gordon: On an Extension of 

 the Phenomena discovered by Dr. Kerr and described by him under the 

 title of „A New Relation between Electricity and Light. William 

 Crookes: On Electrical Insulation in HighVacua. G. D. Liveing: On the 

 Reversal of the Lines of Metallic Vapours. Nr. lY. William Henry 

 Preece and Augustus Stroh: Studies in Acoustics. I, G. D. Liveing 

 and J. De war: On the Reversal of the Lines of Metallic Vapours. 

 J. Nor mann Lockyer: Note on some Spectral Phenomena observed in 

 the Are produced by a Siemens' Machine. Derselbe: Note on some 

 Phenomena attending the Reversal of Lines. Derselbe: Discussion of 

 Young's List of Chromospheric Lines. W. C. Williamson. On the Or- 

 ganization of the Fossil Plauts of the Goal Measures. Part X. P. Geddes: 

 Observations on the Physiology and Histology of Convoluta Sehultzii. 

 Vol. XXVIII Nr. 194. 

 J. T. Bottomley: On the Thermal Conductivity of Water. George 

 Matthey: The Preparation in a State of Purity of the Group of Metals 

 known as the Platinum Series, and Notes upon the Manufacture of Iridio- 

 Platinum. G. D. Liveing and J. Dewar : On the Reversal of the Lines of 

 MetaUic Vapours. Nr. VI. Derselbe: Note of the unknown Chromospheric 

 Substance of Young. William Crookes: Contributions to Molecular 

 Physics in High Vacua. G. D. Liveing and J. Dewar : Note on a Direct 

 Vision Sprectroscope after Thollon's Plan. Henry Trentham: On the 

 nature of the Für on the Fongue. J. Braxton Hicks : Note on the 

 Supplementary Forces concerned in the Abdominal Circiilation in Man. 

 J. Braxton Hicks: Note on the Auxiliary Forces concerned in the Cir- 



