INDEX. 



477 



ment of the electrical capacity of, 

 231. 



Combustion, on the supposed action 

 of light on, 217. 



Copeland (JR.) on winterings in the 

 polar regions during the last fifty 

 years, 340. 



Coquand (Prof. H.) on the cretaceous 

 strata of England and the North of 

 France, 401. 



Corona, observations of the, during 

 the total eclipse, August 7, 1869, 

 281. 



Croli (J.) on the supposed greater loss 

 of heat by the southern than by the 

 northern hemisphere, 220. 



Crookes ( W.) on a binocular spectrum- 

 microscope, 383; on some optical 

 phenomena of opals, 388. 



Dawkins (W. B.) on the British post- 

 glacial mammalia, 39.9. 



Desains (M.) on obscure calorific 

 spectra, 78. 



Deschamps (M.) on the compressibility 

 of liquids, 164. 



Duncan (Dr. P. M.) on the anatomy 

 of the test of Amphidetus Virgi- 

 nianus, 74 ; on fossils from the cre- 

 taceous rocks of Sinai, 163. 



Dupre (Dr. A.) on the specific heat 

 and other physical properties of 

 aqueous mixtures and solutions, 

 158. 



Dynamical theory of the electromag- 

 netic field, on the, 1 . 



Ear, on the structure of the human, 

 118,369. 



Eclipse of August 1868, observations 

 on the, 338. 



Edlund (E.) on the construction of the 

 galvanometer used in electrical dis- 

 charges, and on the path of the 

 extra-currents through the electric 

 spark, 169; on the cause of the 

 phenomena of voltaic cooling and 

 heating, 263. 



Edmonds (T. R.) on vital force ac- 

 cording to age, and the "English 

 Life Table," 18. 



Electric currents, on the development 

 of, by magnetism and heat, 64. 



spark, on the path of the extra- 

 currents through the, 169. 



Electrical conductivity of liquids sup- 

 posed to be insulators, on the mea- 

 surement of the, 165, 470. 



Electricity, on some lecture-experi- 

 ments in, 229. 



Electrification, observations on, 441. 



Electrolytic polarization, on, 243. 



Electromagnetic phenomena, 

 some, 1. 



Electromotive force, comparative mea- 

 surement of, 232. 



Electrophorus, experiments with the, 

 229. 



Electrostatic induction in rarefied 

 gases, on the luminous effects pro- 

 duced by, 407. 



Equilibrium of a liquid mass with- 

 out weight, researches into the 

 figures of, 445. 



Ethylic alcohol and water, on the spe- 

 cific heat and other physical pro- 

 perties of mixtures of, 158. 



Extra-currents, method of demonstra- 

 ting the existence of the inverse 

 and direct, 233. 



Favre (P. A,), thermal researches on 

 the battery by, 310. 



Flight of birds, on the mechanical 

 principles involved in the, 130. 



Flower (J. W.) on the distribution of 

 flint implements in the drift, 467- 



Fluorescent substance, on a new, 136. 



Fluor-spar, on the reflection of heat 

 from the surface of, 405. 



Forces, on the parallelogram of, 428. 



Foster (Prof. G. C.) on some lecture- 

 experiments in electricity, 229. 



Frankland (Prof. E.) on gaseous spec- 

 tra in relation to the physical con- 

 stitution of the sun, 66. 



Fritzsche (Dr. T.) on the production 

 of a columnar structure in metallic 

 tin, 207. 



Fulgurites in the andesite of the 

 Lesser Ararat, on, 436. 



Gallatin (Dr. A. H.) on ammonium 

 alloys, and on tests for nascent hy- 

 drogen, 57. 



Galvanometer, on the construction of 

 the, used in electrical discharges, 

 169. 



Gases, on the expansion of, 322; on 

 the mean velocity of the motion of 

 translation of the molecules in im- 

 perfect, 326 ; on the luminous ef- 

 fects produced by electrostatic in- 

 duction in rarefied, 407. 

 Geological Society, proceedings of 

 the, 73, 162, 235, 320, 399, 465. 



