546 



INDEX. 



Ice at the bottom of running water, 137. 

 Ichthyolites, of Gamrie, 325 ; discovery 



of, 517. 

 Ichthyosauri, structure of, 414. 

 Inglis (Dr.), prize essay on iodine, 441 . 

 Iodide of iron, composition of, 156. 

 Iodine, prize essay on, 441. 

 Ireland, gold-workings of Wicklow, 1 ; 



on the geological map of, 480. 

 Iron : — decomposition of cyanuret of 

 mercury by, 78 ; iodide of, 156 ; ab- 

 sence of magnetism in cast iron when 

 in fusion, 388; manufacture of pig 

 iron, 406. 

 Iron and zinc, sulphuret of, 79. 

 Jacob (Dr.) on fossil Polyparia, 483 ; on 

 the mammary glands in the Cetacea, 

 507. 

 Jerrard (G. B ) on solving equations of 

 the fifth degree, 202 ; on the trans- 

 formation of equations, 478. 

 Johnson (Dr. H.) on the cause of mo- 

 tion in plants, 357. 

 Johnston (Prof.) on oxychloride of an- 

 timony, 332. 

 Jones (T.W.) on the ova of women, 209. 

 Kane (Dr.) on the interference of sound, 

 301 ; on the salts of sulpho-methylic 

 acid, 397 ; on *the protochlorides of 

 platina and tin, 399. 

 Kangaroo, descriptions of the, 66. 

 King (T. W.) on the tricuspid valve of 



the heart, 207. 

 Kupfer-antimonglanz, on, 422. 

 Kupferbluthe, crystalline form of, 159. 

 Languages of uncivilized nations, im- 

 portance of preserving, 27, 94. 

 Lead, corrosion of, 410. 

 Lenses, convex, on the radii of curva- 

 ture of, 234. 

 Levelling instrument, Lloyd's, on the 



verification of, 364. 



Liebeg (M.) on phosphuret of azote,158. 



Light: — nature of, 113, 157; prismatic 



decomposition of electrical, 299 ; 



double refraction and absorption of, 



436 ; its action on plants, 496 ; its 



evolution during crystallization, 534. 



Light and heat, the results of vibratory 



motion, 342 

 Linnaean Society, 519. 

 Litton (Dr.) on the yew at Macruss, 499. 

 Lloyd's levelling instrument, verification 



of, 364. 

 Longitude, on the determination of by 



lunars, 241. 

 Lubbock (J. W.) on the elements of the 

 orbit of Halley's comet in 1759, 139; 

 on the double achromatic object glass, 

 161; on tide observations made at 



Liverpool, 208; on Bernoulli's theory 

 of the tides, 457. 

 Lunar observations, new method of re- 

 ducing, 251. 

 Lyell (C.) on the geology of the islands 



of Seeland and Moen, 412. 

 Mackenzie (Sir G. S.) on meteorology 

 and magnetism, 355 ; on the parallel 

 roads of Glen Roy, 433. 

 Magnetism: — on practical applications 

 of, 305, 306 ; on certain points in, 

 355 ; voltaic, its effects on soft iron, 

 422 ; magnetic attraction, laws of, 

 439. 

 Magneto-electricity, 231 ; magneto-elec- 

 tric induction, 107. 

 M'Cullagh (Mr.) on the reflection and 

 refraction at the surface of crystals, 

 295. 

 M'Gauley (Rev. J. W.) on the ceconomy 



and uses of magnetism, 306. 

 Magnesia, its volatilization by heat, 406. 

 Mallet (R.) on the application of electro- 

 magnetism to manufactures, 305 ; on 

 bleaching turf for the manufacture of 

 paper, 401 ; on phenomena of flame 

 from coal-gas, 404. 

 Mammary glands in the Cetacea, 507. 

 Mantell (G.), proceeds of the Wollaston 

 fund presented to, 52 ; on the bones 

 of birds found in Tilgate Forest, 518 ; 

 on the coffin bone of a horse found 

 near Brighton, 518. 

 Marshall (Dr.) on the zoology of Rath- 



lin, 492. 

 Mayne (Rev. C.) on preserving Echi- 



nodermata, 495. 

 Melloni (M.) on the transmission of 

 calorific rays through diathermal bo- 

 dies, 475. 

 Melolonthidce, a new genus of, 224. 

 Mercury, cyanuret of, its decomposition 



by iron, 78. 

 Mersey and Dee, survey of, 487. 

 Metals, corrosion of by sea-water, on 



the prevention of, 389. 

 Meteorological Table for May, 80 ; for 

 June, 160 ; for July, 240; for Aug., 

 633 ; for Sept., 432 ; for Oct., 542. 

 Meteorology, on certain points in, 355. 

 Methylene, on, 427, 538. 

 Mineralogy: — new locality of plenakite, 

 239 ; rhodizite, 431 ; gadolinite, 430 ; 

 Wolfram, 335 ; analysis of plenakite, 

 540. 

 Mirage, phenomenon resembling, seen 



in the Regent's Park, 77. 

 Murchison (R. I.) on the Silurian sy- 

 stem of rocks, 46, 483 ; on the geology 

 of North Salop and Staffordshire, 415. 



