CONTENTS OF VOL. XXXIV. — FIFTH SERIES. 



Mr. E. J. Houston's Dictionary of Electrical Words, 



Terms, and Phrases 215 



Mr. L. Fletcher's Optical Indicatrix and the Transmission 



of Light in Crystals 217 



On the Electrical Resistance of the Human Body, by M. von 



Frey 218 



On the Electrical Force at the Electrodes, and the Electrifi- 

 cation of a Gas in the Glow-discharge, by L. Warburg. . . . 219 

 On a New Method of Determining the Magnitude of Mole- 

 cules, by G. Jager 220 



NUMBER CC VIII.— SEPTEMBER. 



Mr. A. B. Basset on the Difficulties of Constructing a Theory 



of the Collapse of Boiler-flues 221 



Mr. W. Williams on the Relation of the Dimensions of 



Physical Quantities to Directions in Space 234 



Drs. F. Bedell and A. C. Crehore on Equivalent Resist- 

 ance, Self-induction, and Capacity of Parallel Circuits with 



Harmonic Impressed Electromotive Force 271 



Dr. F. T. Trouton on the Theory of the Use of a perma- 

 nently Magnetized Core in the Telephone 276 



Mr. A. A. Michelson on the Application of Interference 

 Methods to Spectroscopic Measurements. — Part. II. 



(Plates V.- VIII.) 280 



M. M. P. Rudski on the Level of No Strain in a Cooling 



Homogeneous Sphere 299 



Notices respecting New Books : — 



Prof. D. Mendeleeff's Principles of Chemistry 301 



Proceedings of the Geological Society : — 



Mr. R. J. L. Guppy on the Tertiary Microzoic Forma- 

 tions of Trinidad, West Indies 305 



Rev. A. Irving on the Bagshot Beds of Bagshot Heath 306 

 E. A. Johnson Pasha and Mr. H. D, Richmond on the 



Geology of the Nile Valley 306 



On an Apparent Relation of Electromotive Force to Gravity, 



by Dr. G. Gore 307 



On the Mathematical Theory of Ferromagnetism, by H. E. J. 

 G. Du Bois 307 



