562 



INDEX. 



Mascart (M.) on the wave-length of 



the ray A, 238. 

 Maskelyne (Prof. N. S.) on Connel- 



lite, 39 ; on a crystal of columbite 



from Monte Video, 41; on aero- 



litics, 46, 437- 

 Mayer (Dr. J. R.) on the claims of, 



220, 263; on celestial dynamics, 



241, 387, 417; on the mechanical 



equivalent of heat, 493. 

 Mesotype, on new forms of, 43. 

 Meteorite of Alais, on the existence 



of a crystallizable carbon compound 



and free sulphur in the, 319. 

 Meteorites, observations on, 46, 437. 

 Metric weights and measures, on the 



use of, 74. 

 Mica, on a pseudomorph of, 324. 

 Miller (Prof. W. A.) on the photo- 

 graphic transparency of various 



bodies, 304. 

 Millon (M.) on the reduction of silver, 



541. 

 Mineralogical notes, 39, 103,142, 432. 

 Murchison (Sir R.I.) on the Permian 



rocks of Bohemia, 552. 

 Murphy (J. J.) on freshwater lakes 



without outlet, 160. 

 Neumann (Prof.) on the calorific con- 



ductibility of solids, 63. 

 Nickel and cobalt, on the anhydrous 



bibasic arseniate of, 103. 

 Nitrification, on the theory of, and 



on the nature of nitrogen, 27. 

 Numerical approximations, on some 



remarkable, 411. 

 Ozone, experiments on, 208. 

 Persoz (M.) on the solubility of silk, 



215. 

 Phenyle compounds, on some, 218. 

 Phosphorus, on the spectrum of, 542. 

 Photometer, description of anew, 14. 

 Picric acid, on the action of iodide of 



phosphorus on, 540. 

 Polyhedric fan, on the, 266. 

 Probabilities, on the theory of, 313. 

 Propylene, on the synthesis of, 217. 

 Propylic alcohol, researches on, 545. 

 Pseudomorphs, on some specimens of, 



323, 324. 

 Purbeck deposits of England and 



France, on the, 268. 

 Radiation through the earth's atmo- 

 sphere, observations on, 200. 

 Reitlingei\(M.) on the stratification 



of the electric light, 317. 



Relief, on the perception of, 125. 



Rieth (M.) on the synthesis of pro- 

 pylene and amylene, 217. 



Robinson (Dr.) on the spectra of 

 electric light, 486. 



Roscoe (Prof.) on the spectrum pro- 

 duced by the flame evolved in the 

 manufacture of cast steel, 318; on 

 the existence of a crystallizable 

 carbon compound and free sulphur 

 in the Alais meteorite, 319. 



Rose (G.) on the artificial production 

 of marble, 542. 



Rose (H.) on the composition of Sa- 

 marskite, 142. 



Royal Society, proceedings of the, 65, 

 146, 224, 304, 478, 548. 



Rubidium, observations on, 189 ; on 

 the preparation of, 212. 



Ruhmkorff's coil, on a method of 

 varying the intensity of the dis- 

 charge of a, 410. 



Sabine (R.) on a new determination 

 of the mercury unit of electrical 

 resistance, 161. 



Samarskite, on the composition of, 

 142. 



Scheuch (M.) on eugetinic acid, 541. 



.Sea-water, on the constitution of, 

 152. 



Silicon, on a new oxide of, 539; on 

 the ethyle of, 543. 



Silk, on the solubility of, 215. 



Silver, on some native arsenides of, 

 107 ; on the reduction of, 541. 



Skew surface, on equations leading 

 to the, 546. 



Solar spots, observations on, 400. 



Soret (M.) on ozone, 208. 



Sound, on the velocity of the pro- 

 pagation of, 490. 



Spectra, on the photographic effects 

 of metallic and other, obtained by 

 means of the electric spark, 304. 



Spectroscope, on a new form of, 240. 



Spectrum, on variations in the fixed 

 lines of the solar, 342. 



analysis, contributions towards 



the history of, 250, 354. 



Steam, on the law of expansion of 

 superheated, 65. 



Steel, cast, on the spectrum produced 

 by the flame evolved in the manu- 

 facture of, 318. 



Steen (Prof. A.) on equations leading 



. to the skew surface, 546. 



j 



