406 



INDEX. 



ntegral functions, conjugate relations of, 

 324 ; application of, to the theory of 

 Sturm's functions, 326. 



lodo-quinine, or Herapathite, properties 

 of, 398 ; prismatic crystals of, 399 ; 

 absorbent powers of, 400; chemical 

 characters of, 401. 



Ireland, Ordnance survey of, 248. 



Iris, human, structure and physiology of; 

 fibres of, different fi-om muscular fibre, 

 84 ; condition of, in sleep and death, 85. 



, influence of the ophthalmic gan- 

 glion on ; dilation of, in di sease ; different 

 movements of ; effect of section of nerves 

 on, 155 ; of galvanic cmTcnts ; influence 

 of medicinal agents on, 156. 



Isothermals, phenomena of, in the Alps, 7. 



Jones (C. H.), further researches into the 

 structure, development and functions 

 of the liver, 145. 



Jones (H. B.) on the oxidation of am- 

 monia in the human body, &c., 22, 



on the solution of urinary calculi 



in dilute sahne fluids, &c., 268. 



on the acidity, sweetness, and 



strength of wine, beer, and spirits, 

 378. 



Jones (T. W.), discovery that the veins 



of the bat's wing are endowed with 



rythmical contractility, 147. 

 , second appendix to paper on the 



veins of the bat's wing, &c., 192. 

 Jopling (J.) on the relation of cardioids 



to ellipses, 267. 

 Joule (J. P.) on an air-engine, 77. 



, Royal Medal awarded to, 243. 



, determination of specific heat of 



air, 307. 



on the thermal effects of elastic 



fluids, 331. 



Kamtz (Prof.) on con-ections of the 

 constants in the general theory of ter- 

 restrial magnetism, 45. 



on comparison of magnetic obser- 

 vations, 300. 



Kepler's problem, new solution of, 230. 



Lamont (J.), elected foreign member, 

 229. 



Lee (R.) on the nerves which supply the 

 muscular structm'e of the heart, 337. 



Letheby (H.), an account of two cases 

 in which an ovule, or its remains, was 

 discovered after death in the fallopian 

 tube of the unimpregnated human 

 female, 55. 



Light, phenomena of, produced by " inter - 

 ferenz-spectrum," 45. 



, identity of, with heat, electricity 



and magnetism ; effects of, on galvano- 



meter, 92; difference of deflections 

 with difference of time and season, 94. 



Light, experiments on diffraction of, 160 ; 

 fringes of shadows explained by the 

 theory of interferences ; modifications 

 of fringes, 161. 



, further experiments on ; fringes 



produced by speculum, 172 ; reflexion 

 of fringes; mode of examining, 173; 

 similarity of action of transparent and 

 opake plates, 174. 



, change of refrangibihty of, experi- 

 ments on, 195 ; changes in process of 

 internal dispersion, 196 ; invisible rays, 

 two kinds of dispersion, 197 ; exami- 

 nation by linear spectrum, 198 ; in- 

 stantaneous determination of transpa- 

 rency or opacity, 199 ; invisible rays 

 of flame and of electric spark, 200. 



, different breadths of fringes of, 



312 ; different flexibility of rays of, 



313 ; further experiments on, 314. 

 , chemical action of, 317. 



, method for exhibiting change of 



refrangibility by opake objects in day- 

 light ; fluorescence, phenomena of, 334. 



, its influence on the production of 



pictures on the retina, 381. 



, phenomena of, under crystals of 



iodo-quinine, 399. 



Liquids, on the diffusion of, 70; results 

 obtained with salts of potash and soda, 

 71. 



Liver, structm-e, functions and develop- 

 ment of, 145 ; results of observations 

 on, in fish and mammalia, 146. 



Locomotive, conditions under which 

 jumping of wheels takes place, 37. 



Logarithms, extension of the value of the 

 base of, 397. 



Lowe (E. J.) on the mean temperature 

 of the observatory at Highfield House, 

 94. 



on the reproduction of the toad and 



frog without the intermediate stage of 

 tadpole, 292. 



on a new method of propagating 



plants, 376. 



Magnetic declination, annual variation of, 

 greater during day than night ; differ- 

 ences in different months, 73 ; obser- 

 vations of, contrasted ; general system- 

 atic aspect of, 74. 



Magnetic direction, influence of moon 

 on, 338. 



Magnetic distm-bances, periodical laws 

 discoverable in; irregularity of their 

 occurrence ; proportions of, at different 

 times and places, 31 ; connection be- 

 tween, 32. 



