698 



functions, or algebraic couples, as il- 

 lustrating the doctrine of, 519. 



India, on mean temperatures in, 567. 



Inoculation, 73. 



Interference, sonoi-ous, new phseno- 

 menon of) 557. 



Iron, cast, application of the hot blast 

 to the production of, 578. 



Isomerism, on the doctrine of, 579. 



-I 



■imeson (Prof) on the fossil fish Ce- 

 ' phalaspis, 646. 



Jardine (Sir W.) on the SalmonidcB 

 of the North-west of Sutherland- 

 shire, 613. 



Jenyns (Rev. L.) on the recent pro- 

 gress and present state of zoology, 

 143. 



Johnston (J. F. W.) on the chemical 

 composition of the crystallized oxi- 

 chloride of antimony, 587. 



Joints, on excision of diseased, 684. 



Klinometer, new, 594. 

 Knight (Dr.) notice of the flints of 

 Aberdeenshire, 651. 



Lens, polyzonal, 595. 



Leslie's hygrometer, on the use of, 569. 



Light, on the theory of its absorption 



by coloured media, 550. 

 , on the theory of its dispersion by 



the hypothesis of imdulations, 549. 

 , state of our knowledge of the 



physical theory of, 295. 



(uupolarized), propagation of, 



297; principle of interference, 303 ; 

 reflexion and refraction of, 305 ; dif- 

 fraction, 323 ; colours of thin plates, 

 338. 



(polarized), polarization, 350 ; 



transversal vibrations, 352; reflexion 

 and refraction of, 356; double re- 

 fraction, 375 ; colours of crystalline 

 plates, 395. 



Lighthouses, an ceconomical light for, 

 595. 



Limestone of Closeburn, on the, 651. 



Lloyd (Prof) on the progress and pre- 

 sent state of physical optics, 295. 



, account of magnetical observa- 

 tions in Ireland, and of a new me- 

 thod of observing the dip and the 

 force with the same instrument, 

 557. 



Lowe (G.) on some new chemical 



products obtained in gas-works, 



582. 

 Lungs, on their infiltration with black 



matter, 683. 

 Lyell (C.) on the change of level of the 



land and sea in Scandinavia, 652. 



Macgillivray (W.) on the central por- 

 tion of the great mountain range of 

 the South of Scotland, 650. 



Maclaren (Mr.) on the geology of 

 the Pentland Hills, 649. 



Magnetical observations in Ireland, 

 account of, 557. 



Manchester, statistics of, 690. 



Mathematical instruments, 593. 



Mathematics, 513. 



Mechanical arts, 593. 



Mental philosophy, its importance to 

 the medical profession, 670. 



Menteath (C. G. S.) on the limestone 

 of Closeburn, 651. 



Meteorology, 560. ^ 



Miasms, or marshy exb.'^ aeat-,-s{.'-^<,>^a- 



Miller (Prof) on the ■ " ver.iier ^ffg 

 axes of optical elastic ,j . oblique 

 prismatical crystals, 55^. 



Milne (D.) on the geology of Berwick- 

 shire, 624. 



Mineral species, on the value of opti- 

 cal characters in the discrimination 

 of, 575. 



Mineral substances, effects of long 

 continued heat on, 576. 



Mineral veins and the non-metallifer- 

 ous joints in rocks, on the relations 

 of, 654. 



Mineralogy, 571. 



Mississippi river, on the recent changes 

 in the, 9. 



Molluscous animals, present state of 

 knowledge respecting, 213. 



Moon, on her visibility in total eclipses, 

 552. 



Murchison (R. I.) on the old red 

 sandstone and the formations be- 

 neath it, 652. 



Natural history, 596. 



Nerves, cerebral, on the sensibilities 



of, 676. 

 Nervous system, on the proper method 



of studying the, 667. 

 Nervous system and the irritability of 



