CONTENTS OF VOL. XLV1I. — FIFTH SERIES. 



On the Heat produced by Moistening Pulverized Bodies : 

 New Therm ometrical aDd Calorimetrical Kesearches, by 

 Tito Martini 329 



Combinatiou of an Experiment of Ampere with an Experi- 

 ment of Faraday, by J. J. Taudin Chabot 331 



Experiments with the Brush Discharge, by E. W. Marchant . 331 



NUMBER CCLXXXVIL— APEIL. 



Dr. C. Chree on Longitudinal Vibrations in Solid and 



Hollow Cylinders 333 



Mr. R. "W. Wood on some Experiments on Artificial Mirages 



and Tornadoes. (Plate III.) 349 



Mr. J. Eose-Innes and Prof. Sydney Young on the Thermal 



Properties of Normal Pentane 353 



Mr. R. W. Wood on an Application of the Diffraction- 

 Grating to Colour-Photography 368 



Dr. G. Johnstone Stoney on Denudation and Deposition. . . . 372 

 Lord Eayleigh on the Transmission of Light through an 

 Atmosphere containing Small Particles in Suspension, and 



on the Origin of the Blue of the Sky 375 



Prof. Oliver Lodge on Opacity 385 



Prof. J. J. Thomson : Note on Mr. Sutherland's Paper on the 



Cathode Pays 415 



Notices respecting New Books : — 



Harper's Scientific Memoirs, edited by Dr. J. S. Ames. . 417 

 Proceedings of the Geological Society : — 



Mr. W. Wickbam King on the Permian Conglomerates 



of the Lower Severn Basin 417 



Dr. Maria M. Ogilvie [Mrs. Gordon] on the Torsion- 

 Structure of the Dolomites 419 



NUMBEK CCLXXXVIIL— MAY. 



Mr. F. H. Pitcher on the Effects of Temperature and of 

 Circular Magnetization on Longitudinally Magnetized Iron 

 Wire 42L 



Dr. Edwin H. Barton on the Equivalent Resistance and 

 Inductance of a Wire to an Oscillatory Discharge 433 



Mr. L. N. G. Filon on certain Diffraction Fringes as applied 

 to Micrometric Observations 441 



