IV CONTENTS OF VOL. XII.— FIFTH SERIES. 



Page 



Note by Dr. 0. E. Alder Wright on Mr. Shida's paper " On 

 the Number of Electrostatic Units in the Electromagnetic 

 Unit," and on his recent Note thereon 76 



The Phenomenon called the " Cry of Tin," by J. C. Douglas . . 77 



Discussion of the Theory of the three Fundamental Colour- 

 Sensations, by A. Eosenstiehl 78 



NUMBEE LXXIIL— AUGUST. 



Lord Eayleigh on the Electromagnetic Theory of Light .... 81 



Prof. E. W. Clarke's Abstract of the- Eesults obtained in a 

 Becalculation of the Atomic Weights 101 



Prof. S. P. Thompson on the Opacity of Tourmaline Crystals 112 



Dr. J. Moser's Electrostatic Investigations, especially relatiDg 

 to the Division of Induction in the Differential Inducto- 

 meter and in the Electrophorus 130 



Dr. E. J. Mills's Eemarks on Thermometry 142 



Mr. C. J. Woodward on a Wave-apparatus for Lecture-Pur- 

 poses to illustrate Eresnel's Conception of Polarized Light. 

 (Plate II.) 145 



Prof. Tait on Thermal Conductivity, and on the Effects of 

 Temperature-Changes of Specific Heat and Conductivity 

 on the Propagation of Plane Heat- Waves 147 



On the Principle of the Conservation of Electricit}^ by M. Gr. 

 Lippmann 151 



Mr. E. Shida on Dr. C. E. Alder Wright's Note published in 

 the Philosophical Magazine for July 1881 154 



Note on the Photographic Spectrum of Comet b 1881, by 

 William Huggins, D.C.L., LL.D., E.E.S 155 



On the Existence of the Luminiferous iEther, by E. H. Cook. 156 



NUMBEE LXXIV.— SEPTEMBEE. 



Dr. E. H. Hall on the " Eotational Coefficient " in Nickel and 

 Cobalt 157 



Prof. Stewart and Mr. W. Stroud on the Eesults obtained from 

 a Modification of Bunsen's Calorimeter 172 



Sir Gr. B. Airy on a Systematic Interruption in the Order of 

 Numerical Values of Vulgar Eractions, when arranged in a 

 Series of consecutive Magnitudes 175 



Mr. E. H. M. Bosanquet on the Laboratory at St. John's Col- 

 lege, Oxford 178 



Messrs. Thorpe and Eiicker on Dr. Mills's Eesearches on Ther- 

 mometry. — No. II 184 



Sir James Cockle on the Inverse Problem of Criticoids 189 



