550 



INDEX. 



Nepheline,and Elaeolith, 105 ; from Monte 

 Somma, 109 ; analysis of, 109. 



Nervous system, on the, 146. 



Nickel ore, on crystallized, 335 ; analysis 

 of, 336. 



Nitre, on the form and optical constants 

 of, 38. 



Nitrites formed by direct combination, 159. 



Nomenclature, chemical, 181. 



Norwich, chalk near, on the Paramoudra 

 from the, 230. 



Nosean, analysis of, 104. 



Notices respecting new books: — Dr. F. J. 

 F. Meyen, on the progress of Vegetable 

 Physiology during tbe year 1837, 65. 



Octahedral copper pyrites, analyses of, 202. 



Oils : — on tbe presence of iodine in cod, 

 78 ; potatoe spirit, of the French che- 

 mists, 86; detection of alcohol in essen- 

 tial, 232 ; on the detection and estima- 

 tion of colophony, when dissolved in 

 the fixed, 289. 



Optical constants of nitre, on the form 

 and, 38. 



Optics, physical, on Huyghen's principle 

 applied to, 243, 431. 



Organic radicals, 179. 



Ornithorhynchus hystrix, on the fiorm of 

 the blood particles of the, 298. 



Owen (Richard), description of the soft 

 parts, and of the shape of the hind fin 

 of the Ichthyosaurus, 69 ; description 

 of the fossil remains of a mammal, a 

 bird, and a serpent, from the London 

 clay, 149. 



Oxide, blue, of titanium in scoriae, 398 ; 

 blue, of titanium, 542. 



Oxides, metallic, 238. 



Oxmantown (Lord) on experiments on 

 the reflecting telescope, 380. 



Palaeontology, 519. 



Palestine, Egypt, the southern limit of the 

 vine, 97. 



Palgrave (Sir Francis) on the shooting 

 stars of 1095 and 1243, 143. 



Paramoudra from the chalk near Nor- 

 wich, on the, 230. 



Parnell (E. A.) on the composition of 

 inulin, 126 ; on sulphocyanogen, 249. 



Pattinson (H. L.) on the electricity of high- 

 pressure steam, 375 ; further experi- 

 ments on the electricity of steam, 457. 



Pembrokeshire coal, analysis of, 215. 



Pepsin — the principle of digestion, 317. 



Petalite and spodumene, analyses of, 103. 



Photographic agents : — on hydriodates as, 

 202 ; preparation of the paper, 203 ; 

 use of sulphate and muriate of iron as, 

 204; of acetate and nitrate of lead; of 

 muriate and nitrate of copper ; of chlo- 

 ride of gold, 204 ; of the muriated so- 



lutions, 206 ; of the solution of silver ; 

 of the hydriodic solutions ; of the hy- 

 driodates of potassa and soda, 207 ; of 

 iron, lime, manganese, hydriodic acid, 

 hydriodate of baryta, 208 ; of hydriodic 

 salts as, 260 ; of iodide of silver as a, 

 264. 



Photographs, preparation of the paper for 

 taking, 203 ; directions for taking, 209 ; 

 on fixing them, 210 ; on the darkening 

 of the, 260. 



Phosphoric acid, crystallized, composition 

 of, 232. 



Physical optics, on Huyghen's principle 

 applied to, 243, 431. 



Pigotite, on the constitution of, 382. 



Pihlite, a new mineral, 479. 



Pillars of cast iron, on the strength of, 

 and other materials, 294. 



Pirropina and chelidonia, 543. 



Platina, carburet of, 234 ; on a new corn- 

 pound of, 397 ; on the reduction of 

 potassio-chlorideof, 157. 



Platina-zinc and copper-zinc voltaic pairs, 

 241. 



Pleiades, catalogue of the, by Mr. Snow, 

 310. 



Plumbiferous arragonite, 102. 



Poonalite and thulite, analysis of, 103. 



Portland and Wealden formations, 513. 



Positive geology — Devonian system, 508. 



Potassa pure, iodo -ferrocyanate of, table 

 of precipitates with the^ 201 ; table of 

 precipitates with the red ferrocyanate 

 of, 201. 



Potassio-chloride of platina, on the reduc- 

 tion of, 157. 



Potassium, ferrosesquicyanuret of, 381 ; 

 detection of iodate of potash in iodide 

 of, 316 ; on the ferrosesquicyanuret of, 

 193. 



Potatoe spirit oil of the French chemists, 

 86 ; its composition,' 87. 



Potter (R.) on Huyghen's principle ap- 

 plied to physical optics, 243, 431. 



Powell (Rev. Baden) on the theory of the 

 dark bands formed in the spectrum, 

 from partial interception by transparent 

 plates, 81 ; on the solar spectrum, 144. 



Prague, magnetic observatory at, deduc- 

 tions from the first year's observations 

 at the, 418. 



Precipitates, table of, with the iodo-ferro- 

 cyanate of potassa pure, 201 ; with the 

 red ferrocyanate of potassa, 201. 



Prismatic spectrum, on the theory of the 

 dark bands formed in the, 81. 



Protein, on the, of the crystalline humour, 

 398. 



Pyrites, copper, analyses of octahedral, 202. 



Pyrrhite, a new mineral, 478. 



