CONTENTS OF VOL. VII. FIFTH SERIES. V 



NUMBER XLJLL— MAECH. 



Page 



Lord Eayleigh's Acoustical Observations. — II 149 



Dr. J. Hopkinson on High Electrical Resistances 162 



Prof. J. Trowbridge on Methods of Measuring Electric Cur- 

 rents of great Strength ; together with a Comparison of the 

 Wilde, the Gramme, and the Siemens Machines. (Plate VIII. 



figs. 1 & 2.) 165 



MM. Kundt and Rontgen on a Proof of the Electromagnetic 

 Rotation of the Plane of Polarization of Light in the Vapour 



of Sulphide of Carbon. (Plate VIII. fig. 3.) 173 



Mr. W. J. Lewis on the Analysis of the Rhombohedral System 176 

 Prof. Osborne Reynolds on Mr. G. F. Eitzgerald's Paper " On 



the Mechanical Theory of Crookes's Force " 179 



Prof. A. Steinhauser on the Theory of Binaural Audition. 



(Plate IX.) 181 



Dr. O. J. Lodge on the Determination of the Variation of the 

 Thermal Conductivity of Metals with Temperature, by 

 means of the permanent Curve of Temperature along a uni- 

 form thin Rod heated at one end. (Plate X.) 198 



Notices respecting New Books : — 



Dr. Draper's Scientific Memoirs, being experimental 



Contributions to a Knowledge of Radiant Energy. ... 211 

 Geological Survey of Canada. Report of Progress for 



1876-77 213 



The Rev. W. B. Clarke on the Sedimentary Formations 



of New South Wales ." 214 



Proceedings of the Geological Society : — 



Mr. F. Rutley on Community of Structure in Rocks of 



Dissimilar Origiu 215 



Mr. A. Murray on the Distribution of the Serpentine and 

 associated Rocks, with their Metallic Ores, in New- 

 foundland , 216 



On the Electromagnetic Theory of the Reflection and Refrac- 

 tion of Light, by George Francis Fitzgerald, M.A., Fellow 



of Trinity College, Dublin : 216 



On the Velocity of very loud Sounds, by William W. Jacques, 



Fellow of the Johns Hopkins University 219 



Researches on Bell's Telephone, by Henri Dufour 222 



On Harmonic Orbits, by Pliny Earle Chase . 224 



NUMBER XLIIL— APRIL. 



Mr. E. H. Cook on the Existence of the Luminiferous Ether. . 225 

 Mr. R. D. Oldham on the Modulus of Cohesion of Ice, and its 



bearing on the Theory of Glacial Erosion of Lake-basins . . 240 

 Prof. E. Wiedemann on the Luminosity of Gases through 



Electrical Discharges , 248 



