IV CONTENTS OF VOL. XXVII. FIFTH SERIES, 



Page 

 NLTMBEE CLXV.— rEBEUART. 



Mr. J. C. McConnel on the Polarization of Sky Light (Plate VII.) 81 

 Prof. A. W. Eiicker on the Suppressed Dimensions of Physical 



Quantities 104 



Mr. S. Newcomb on the Definition of the Terms " Energy " 



and " Work" 115 



Mr. H. Nagaoka on the Combined Eifects of Torsion and Lon- 

 gitudinal Stress on the Magnetization of Nickel. (Plates 

 II.-V.) With a Note by Messrs. J. T. Bottomley and A. 



Tanakadate. (Plate VI.) 117 



Messrs. J. Trowbridge and W. C. Sabine on the Use of Steam 



in Spectrum Analysis , . 139 



Mr. W. Sutherland on Molecular Refraction 141 



Mr. C. Barus on the Viscous Effect of Strains Mechanically 



applied, as Interpreted by Maxwell's Theory 155 



Mr. T. H. Blakesley on some Pacts connected with the Systems 



of Scientific Units of Measurement 178 



Mr. G. Hookham on Permanent Magnet Circuits 186 



Mr. C. Davison on M. Ph. Piantamour's Observations by means 

 of Levels on the Periodic Movements of the Ground at 



Secheron, near Geneva 189 



Notices respecting New Books : — 



MM. E. Mascart and J. Joubert's Treatise on Electricity 



and Magnetism 200 



Proceedings of the Geological Society : — 



Prof. T. G. Bonney's Notes on two Traverses of the Cry- 

 stalline Rocks of the Alps 203 



Mr. E. Rutley on Eulgurites from Monte Viso 205 



Mr. T. T. Groom on the Occurrence of a new Eorm of 

 Tachylyte in association with the Gabbro of Carrock 



Pell, in the Lake District 205 



On the Effect of Twist in Magnetization, by Mr. H. Nagaoka. 206 

 On the Alteration of the Constant of Elasticity of Metals by 



the Electric Current, by C. A. Mebius ". 207 



On an Electrometer with a Quartz Double Plate, by M. Jacques 



and P. Currie 207 



Effects of Lightning, by Mr. C. Tomlinson 208 



The Bressa Prize 208 



NUMBER CLXVL— MARCH. 



Prof. E. E. Herroun on the Divergence of Electromotive Forces 

 from Thermochemical Data 209 



Mr. T. Mellard Reade on the Effects of Contraction during 

 the Cooling of Intrusive Masses of Granite and the Cause 

 of their Solid Continuity 233 



