478 



INDEX. 



Gore (G.) on a momentary molecular 

 change in iron wire, 59 ; on the de- 

 velopment of electric currents by 

 magnetism and heat, 64. 



Graham (T.) on hydrogenium, 459. 



Haidinger (Prof.) on the polarization 

 of light by air mixed with aqueous 

 vapour, 54. 



Hailstorms, on remarkable, 440. 



Heat, on the development of electric 

 currents by, 64 ; of the stars, on 

 the, 69 ; consumed in internal work 

 when a gas dilates under the pres- 

 sure of the atmosphere, on the, 76; 

 produced in solid bodies when 

 sounded, on the, 138; developed 

 in discontinuous currents, on the, 

 166 ; on the supposed greater loss 

 of, by the southern than by the 

 northern hemisphere, 220 ; on 

 the radiation of, from the moon, 

 314 ; on the emission and absorp- 

 tion of, radiated at low tempera- 

 tures, 403 ; on the reflection of, 

 from the surface of fluor-spar, 405. 



Herschel (Lieut. J.) on spectroscopic 

 observations of the eclipse of Au- 

 gust 1868, 338. 



Herwig (Dr. H.) on the conformity 

 of vapours to Mariotte and Gay- 

 Lussac's law, 284. 



Horopter, on the, 193. 



Huggins (AY.) on a method of view- 

 ing the solar prominences without 



. an eclipse, 68 ; on the heat of the 

 stars, 69. 



Hull (E.) on a ridge of lower carboni- 

 ferous rocks crossing the plain of 

 Cheshire beneath the trias, 321. 



Hutton (Capt. F. W.) on Nga Tutura, 

 an extinct volcano in New Zealand, 

 73 ; on the mechanical principles 

 involved in the sailing-flight of the 

 Albatros, 130. 



Huxlev (Prof. T. H.) on Hyperoda- 

 pedon, 238. 



Hydrogen, on tests for nascent, 57. 



Hydrogenium, on the alloy of palla- 

 dium and, 51 ; further researches 

 on, 459. 



Iron, on the limits of the magnetiza- 

 tion of, 404. 



wire, on a momentary molecu- 

 lar change in, 59. 



Jamin (M.) on the heat developed in 

 discontinuous currents, 166. 



Judd (J. W.) on the origin of the 

 Northampton sand, 400. 



Kenngott (Prof. A.) on the microsco- 

 pic structure of the Knyahynia 

 meteorite, 424. 



King (Prof. W.) on the so-called eo- 

 zoonal rock, 235. 



Kimjsinill (T. W.) on the geology of 

 China, 238. 



Kohlrausch (F.) on the specific heat 

 of air under constant volume, 430. 



LeConte (Prof. J.) on some pheno- 

 mena of binocular vision, 179. 



Le Neve Foster (C.) on the occur- 

 rence of celestine in the tertiary 

 rocks of Egypt, 162. 



Le Roux (F. P.) on the luminous 

 effects produced by electrostatic 

 induction in rarefied gases, 407- 



Light, on the polarization of, by air 

 mixed with aqueous vapour, 54; 

 on the supposed action of, on com- 

 bustion, 217?; on a theory of the 

 dispersion of, 269. 



Liquids, on the compressibility of, 

 164; on the electrical conducti- 

 vity of, 165, 470 : on the formation 

 of bubbles of gas and of vapour in, 

 204 ; on the superficial tension of, 

 445 ; on the extension of, upon 

 each other, 468. 



Lockyer (J. N.) on gaseous spectra, 

 66 ; on recent discoveries in solar 

 physics, 142. 



Lortet (M.) on disturbances of respi- 

 ration, circulation, and of the 

 production of heat on ascending 

 great heights, 472. 



Ludtge (R.) on the extension of li- 

 quids upon each other, 468. 



Lunar atmosphere, on the existence 

 of a, 281. 



Magnetism, on the hydrodynamical 

 theory of, 42; on the development 

 of electric currents by, 64. 



Magnetization of iron and steel, on 

 the limits of the, 404. 



Magnus (Prof. G.) on the emission 

 and absorption of heat radiated at 

 low temperatures, 403 ; on the re- 

 flection of heat from the surface of 

 fluor-spar and other bodies, 405. 



Marcet (Dr. AY.) on the temperature 

 of the human body at various alti- 

 tudes, in connexion with the act of 

 ascending, 329. 



