INDEX. 



451 



Jamin (M.) on an electrical burner 

 and blowpipe, 872. 



Kundt (A.) on the electromagnetic 

 rotation of the plane of polarization 

 of light in the vapour of sulphide 

 of carbon, 173. 



Lang (V. von) on a horizontal gonio- 

 meter, 126 ; on the optical proper- 

 ties of starch, 370. 



Leeds (Dr. A. R.) on the action of 

 light upon the soluble iodides, 393. 



Lewis (W. J.) on the analysis of the 

 rhombohedral system, 176. 



Light, on the theory of the electric, 

 29; on the electromagnetic rota- 

 tion of the plane of polarization of, 

 in the vapour of sulphide of carbon, 

 173 ; on the electromagnetic theory 

 of the reflection and refraction of, 

 216; on the action of, upon the 

 soluble iodides, 393. 



Lightning, on spectra of, 316. 



Lightning-rods, on the proper rela- 

 tive sectional areas for copper and 

 iron, 336. 



Liquids, on the diffusion of, 74, 295. 



Liquid surfaces, on a new application 

 of the potential energy of, 432. 



Lodge (Dr. 0. J.) on the determina- 

 tion of the variation of the thermal 

 conductivity of metals, 198, 251, 

 380. 



Lommel (E.) on two new fluorescent 

 substances, 144. 



Luminiferous ether, on the existence 

 of the, 225. 



Magnetism, on a new theory of ter- 

 restrial, 401. 



Magnets, on the morphological laws 

 of the configurations formed by 

 floating, 98. 



Mars, on the figure of the planet, 67. 



Maskelyne (N. S.) on the crystallo- 

 graphy of the nitrosoterpenes, 129 ; 

 on an artificial diopside rock, 133 ; 

 on enstatite rock from South Africa, 

 135. 



Matter, on an ultra-gaseous state of, 

 63. 



Mayer (A. M.) on the morphological 

 laws of the configurations formed 

 by floating magnets, 98. 



Mensbrugghe (Prof. G. van der) on 

 a new application of the potential 

 energy of liquid surfaces, 432. 



Metals, on the determination of the 



variation of the thermal conducti- 

 vity of, 198, 251, 380. 



Microphone, on the theory of the, 

 377. 



Mills (Prof. E. J.) on the detached 

 colorimeter and on colorimetry, 

 437. 



Mineral veins, on the formation of, 

 441. 



Molecular pressure, on the illumina- 

 tion of lines of, 57. 



structure, on the explanation of 



some phenomena of, 98. 



Motion, on visible, 117. 



Naquet (A.) on Sir B. C. Brodie's 

 calculus of chemical operations, 418. 



Nitrosoterpenes, on the crystallogra- 

 phy of the, 129. 



Oldham (R. D.) on the modulus of 

 cohesion of ice, 240. 



Oxides, on the nomenclature' of, 126. 



Oxygen, on the spectrum of, 297. 



Ozone, observations on, 447. 



Paalzow (M.) on the spectrum of 

 oxygen, and on the electrical lu- 

 minous phenomena of rarefied 

 gases, 297. 



Permanganate of potash, on some re- 

 actions of alkaline, 138. 



Perry (Prof. J.) on the music of 

 colour and visible motion, 117; on 

 the ratio of the electromagnetic to 

 the electrostatic unit of electric 

 quantity, 277 ; on a new theory of 

 terrestrial magnetism, 401. 



Phillips (J. A.) on mineral veins, 

 441. 



Photographic method of registering 

 absorption-spectra, on the, 313. 



Pictet (R.) on a demonstration of the 

 definition "the temperature of a 

 body is represented by the length 

 of the thermal oscillation of its 

 molecules," 445. 



Polariscope, on the behaviour of 

 starch and unannealed glass under 

 the, 39. 



Preece (W. H.) on the electric light, 

 29. 



Pressure, on the part played by, in 

 chemical phenomena, 70. 



Pressures, on the maintenance of con- 

 stant, 411. 



Quincke (Dr. G.) on the formation 

 of emulsions, and the action of the 

 bile in digestion, 301. 



