INDEX. 



7 ; on the preparation and composition 

 of, 152, 519. 

 Hall (Dr. M.) on the effects of certain 

 physical and chemical agents on the 

 nervous system, 72. 

 Hamilton (Sir W. R.) on quaternions ; or 

 on a new system of imaginaries in al- 

 gebra, 214, 278, 511. 

 Hansen (M.) on inequalities in the motion 



of the moon, 382. 

 Hare (Dr. R.) on the fusion of iridium 

 and rhodium, 147 ; on certain improve- 

 ments in the construction and supply 

 of the hydro-oxygen blowpipe, 356. 

 Hargreave (C. J.) on the solution of linear 



differential equations, 372. 

 Hearn (G. W.) on the cause of the discre- 

 pancies observed by Mr. Baily with 

 the Cavendish apparatus for determi- 

 ning the mean density of the earth, 73. 

 Heat, on the amount of radiation of, from 

 the earth's surface, 69 ; on the mecha- 

 nical equivalent of, 173. 

 Hebe, notice respecting the planet, 158. 

 Heintz (M.) on creatine, 236. 

 Higginbottom (J.) on the number of spe- 

 cies and the mode of development of 

 the British Triton, 74. 

 Hind (J. R.) on the expected reappear- 

 ance of the celebrated comet of 1264 

 and 1556, 50 ; observations of Hind's 

 second comet in full sunshine, 145 ; 

 on the planet Hebe, 158; on the new 

 planet Iris, 237. 

 Hippuric acid, on the preparation of, 127. 

 How (H.) on the analysis of the ashes of 



the orange-tree, 271. 

 Hutchinson (J.) on the function of the 

 intercostal muscles, and on the respi- 

 ratory movements, with some remarks 

 on muscular power, in man, 222. 

 Induction, memoir on, 241. 

 Ink, invisible, on a new, 176. 

 Integrals, on the inverse calculus of de- 

 finite, 12. 

 Iridium, on the fusion of, 147, 365. 

 Iris, notice respecting the new planet, 237. 

 Jacobi (Prof. M. H.) on the reabsorption 

 of the mixed gases in the voltameter, 72. 

 Jones (C. H.) on the structxxre and de- 

 velopment of the liver, 224. 

 Joule (J. P.) on the theoretical velocity 

 of sound, 114; on the mechanical equi- 

 valent of heat, as determined by the 

 heatevolvedby thefriction of fluids, 1 73. 

 Kane (Sir R.) on the composition and cha- 

 racters of certain soils and waters be- 

 longing to the flax districts of Belgium, 

 36, 105. 

 Kindt (G. C.) on the detection of cotton 

 in linen, 157. 



Koenig (F.), inventor of the printing-ma- 

 chine, 297. 

 Kolbe (Dr. H.) on the chemical constitu- 

 tion of metacetonicacid, and some other 

 bodies related to it, 266 ; on the decom- 

 position of valerianic acid, by means of 

 the voltaic current 348. 

 Kopp (M. E.) on balsam of Tolu, and some 

 products derived from it, 153 ; on the 

 action of hydrochloric acid in the for- 

 mation of oxalic acid, 233. 

 Ledoyen's disinfecting fluid, remarks on, 



233. 

 Lefroy (Capt. J. H.) on a great magnetic 

 disturbance on the 24th of September 

 1847, 346. 

 Liebig (Prof.) on a new test for prussic 

 acid, and on a simple method of pre- 

 paring the sulphocyanide of ammonium, 

 146. 

 Lignine, on the preparation and composi- 

 tion of, 397. 

 Linen, on the detection of cotton in, 157. 

 Liver, on the structure and development 



of the, 224. 

 Longitude, on the determination of differ- 

 ences of, by the electric telegraph, 

 338. 

 Loomis (Prof.) on the determination of 

 differences of longitude by means of the 

 electric telegraph, 338. 

 Lubbock (Sir J.) on the perturbations of 

 planets moving in eccentric and inclined 

 orbits, 1, 86 ; on the heat of vapours, 90 ; 

 on the development of the disturbing 

 function R, 144. 

 Madder, on the colouring matters of, 46. 

 Magnetic declination at St. Helena, on the 



diurnal variation of the, 70. 

 Magnetic disturbance, on a great, 346. 

 Magnetism, influence of, on the voltaic 



arc, 328. 

 Malaguti (M.) on the extraction of silver, 



317. 

 Mannite, action of nitric acid on, 316. 

 Margaric acid, observations on, 167. 

 Mechanics, on a new notation for ex- 

 pressing various conditions and equa- 

 tions in, 134 ; contributions towards a 

 system of symbolical, 139. 

 Mercer (J.) on the action of a mixture of 

 red prussiate of potash and caustic al- 

 kali upon colouring matters, 1 26. 

 Merck (G.) on the water of the thermal 



spring of Bath, 56. 

 Meridian instruments, on the properties 

 of rock as a foundation of the piers of, 

 531. 

 Metacetonic acid, on the constitution of, 



266. 

 Metapectic acid, 389. 



