CONTENTS OF VOL. XVII. FIFTH SERIES. V 



NITMBEE C^ I.— APRIL. 



Pa s e 



Mr. S. Bidwell on some Experiments illustrating an Expla- 

 nation of Hall's Phenomenon. (Plate XI.) 249 



Prof. S. P. Thompson on the Adjustment of Besistance-Coils. 265 

 Mr. G. Kamensky on the Electric Conductivity and other 



Properties of the Copper- Antimony Alloys 270 



Dr. J. Croll on Professor Newconib's " Eejoinder " 275 



Messrs. Wright and Thompson on the Determination of 

 Chemical Affinity in terms of Electromotive Porce. — Part 



VIII. (Plate VI.) 282 



Professors Liveing and Dewar on the Temperature of Sun- 

 spots 302 



Professors "W. E. Ayrton and J. Perry on Direct-Eeading 

 Electro-Measuring Instruments, and a Non- Sparking Key. 



(Plate XII.) 304 



Notices respecting New Books : — 



Mr. J. E. Marr's Classification of the Cambrian and Silu- 

 rian Eocks, being the Sedgwick Prize Essay for the 



Tear 1882 314 



Mr. J. Macfadzean's Parallel Eoads of Glenroy 319 



Proceedings of the Geological Society : — 



Mr. J. J. H. Teall's Penological Notes on some North- 



of -England Dykes 321 



Mr. C. Parkinson on the Droitwich Brine-Springs and 



Saliferous Marls 322 



Eev. Prof. Blake on the Volcanic Group of St. Davids . . 322 

 Mr. J. H. Collins on the Serpentine and associated Eocks 



of Porthalla Cove 324 



Mr. C. M. Doughty on the Geology of Arabia 325 



Electromagnetic Induction in Spheres, by Prof. E. Himstedt 



and Prof. Larmor 326 



On a Simple Method of investigating the Thermoelectricity 

 and Piezoelectricity of Crystals, by A. Kundt 328 



NUMBEE CVIL— MAT. 



Dr. B. Hasselberg on the Second Spectrum of Hydrogen. 

 (Plate X. figs. 1-3.) 329 



Mr. J. J. Hood on the Eate of Chemical Absorption of Gases, 

 with regard to their Interdiffusion. (Plate X. fig. 4.) .... 352 



Dr. J. Croll's Examination of Mr. A. E. Wallace's Modifica- 

 tion of the Physical Theory of Secular Changes of Climate. — 

 Part II 367 



Messrs. Wright and Thompson on the Determination of Che- 

 mical Affinity in terms of Electromotive Force. — Part VIII. 377 



Prof. J. J. Sylvester on the Solution of a Class of Equations in 

 Quaternions 392 



