54-5 



INDEX TO VOL. XVII. 



Cassiopeia, on the variability of, 310; 

 observation of, in 1831 and 1832, 310. 



Acechlor-platina, 157. 



Acetate and nitrate of lead, on the use of, 

 as photographic agents, 204. 



Acetone, (Economical preparation of, 233. 



Acids: on the formation of lampic, 76; 

 uncombined hyposulphurous, 77 ; hy- 

 drochloric and sulphuric, in claeoliths, 

 113; hydriodic,as a photographic agent, 

 ^208 ; composition of crystallized phos- 

 'phoric, 232 ; hydromellonic, 231, 238 ; 

 chromic, 231; crystallized phosphoric, 

 232 ; cyanilic, 239 ; mudesic, 382. 



Airy (Prof. G. B.) on the theoretical ex- 

 planation of an apparently new polarity 

 in light, 381 ;-remarks on Prof. Challis's 

 investigation of the motion of a small 

 sphere vibrating in a resisting medium, 

 481. 



Alcohol, detection of, in essential oils, 232. 



Allenheads, meteorological journal kept 

 at, extracts from a, 293. 



Alten, Finmarken, on the meteorological 

 observations made at, by Mr. S. H. 

 Thomas, 295. 



Ammonia, on the theoretical constitution 

 of the compounds of, 120. 



Analyses : of a new species of biliary 

 calculus, 10 ; of the ashes of the Salsola 

 tragus, 77 ; of petalite and spodumene, 

 103; of poonalite and thulite, 103; of 

 boracite from Liineburg, 104 ; of no- 

 sean, hauyne, lazulite and artificial 

 ultramarine, 104 ; of gmelinite from 

 Glenarm, 105 ; of various ejaeoliths, 

 106; of green elaeolith, 107 ; of brown 

 elaeolith, 108 ; of white elaeolith, 108, 

 111; ofnepheline, 1 09 ; white elteolith 

 from Katzenbuchel in the Odenwalde, 

 111 ; of inulin, 127; of monazite, 202; 

 of octahedral copper pyrites, 202 ; of 

 Pembrokeshire coal, 215; of a vein of an- 

 thracite coal, called the Gwerdd (green) 

 vein, 213; of anthracite coal of South 

 Wales, 213 ; of cupreo-sulphate of lead, 

 403; of sulphato-carbonate of lead, 403; 

 ofsulphato-tricarbonate of lead, 403 ; of 

 cupreo sulphato-carbonate of lead, 405. 



Anatomy of the brain, on the, 14. 



Ancient Italy, vegetation of; the beech, 

 the date palm, the olive, 92. 



Phil. Mag. S. 3. Vol. 17. No. 113. 



Anniversary Address of the Geological 



Society, 307. 

 Ansted (David T.) on the carboniferous 



and transition rocks of Bohemia, 226. 

 Anthracite coal of South Wales, on the, 



211 ; analysis of, 213. 

 a Orionis, on the variability and periodic 



nature of the star, 311. 

 Apjohn (Prof. J.) on the potatoe spirit oil 



of the French chemists, 86. 

 Archil and litmus, on the chemical history 



of, 299. 

 Argand lamp, on increasing the light of a 



common, 40. 

 Armstrong (W. G.) on the electricity of 



a jet of steam issuing from a boiler, 370 ; 



on the electricity of effluent steam, 452. 

 Arragonite, plumbiferous, 102. 

 Arsenic with cobalt, on some combinations 



of, 331. 

 Ashes of the Salsola tragus, analysis of 



the, 77. 

 Astronomical refractions, on, 272, 467, 



488. 

 Astronomical Society, proceedings of the, 



309. 

 Atmosphere, on the conditions of the, and 



on the calculation of heights by the 



barometer, 276, 467. 



Atomic theory of colours, diagrams show- 

 ing the different stages of the, 37 ; ato- 

 mic weight of carbon, 477. 

 Austin (Major) on the geology around 



the shores of Waterford Haven, 68. 

 Barometer, variations of the mean height 



of the, 143 ; on the calculation of heights 



by the, 467. 

 Barry (Dr. Martin) on the corpuscles of 



the blood, 157, 300 ; researches in em- 

 bryology, third series, 385. 

 Baryta, hydriodate of, on the use of, as 



a photographic agent, 208. 

 Battery, voltaic, on the tension spark from 



the, 215. 

 Beaumont (J. T. Barber) on the origin 



of the vegetation of our coal-fields and 



Wealdens, 67. 



Bell (Sir C.) on the nervous system, 146. 

 Biliary calculus, on a new species of, 8 ; 



analysis of, 10. 

 Birt (W. II.), observations of a Cassiopeia 



in 1831 and 1832, 310. 



Suppl. Jan. 1841. 2 N 



