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INDEX TO VOL. XXIY. 



Arctic Shell-Clay of Elie and Errol, viewed in connection with our other Glacial and more recent 

 Deposits. By Rev. Thomas Brown, 617. 



B 



Bands formed by the Superposition of Paragenic Spectra, produced by the Grooved Surfaces of Glass 



and Steel. By Sir David Brewstek. Parts I. and II., 221, 227. 

 Blackie (Professor). On the Principle of Onomatopoeia in Language, 1. 



On the Sophists of the Fifth Century B.C., 657. 



Blood, Miscellaneous Observations on. By Dr John Davy, 1 9. 

 Brewster (Sir David). On the Cause and Cure of Cataract, 11. 



On Hemiopsy or Half- Vision, 15. 



On the Bands formed by the Superposition of Paragenic Spectra, produced by the 



Grooved Surfaces of Glass and Steel. Parts I. and II., 221, 227. 



On the Influence of the Doubly Refracting Force of Calcareous Spar on the Polarisa- 



tion, Intensity, and Colour of the Light which it reflects, 233. 



Additional Observations on the Polarisation of the Atmosphere, made at St Andrews, 



1841-45, 247. 



On a New Property of the Retina, 327. 



Report on the Hourly Meteorological Register kept at Leith Fort in the years 1826 



and 1827, 351. 



On the Colours of the Soap-Bubble, 491. 



On the Figures of Equilibrium in Liquid Films, 505. 



Description of a Double Holophote Apparatus for Lighthouses, and of a Method of 



Introducing the Electric and other Lights, 635. 



On the Motions and Colours upon Films of Alcohol and Volatile Oils and other 



Fluids, 653. 

 Broun (John Allan). On the Diurnal Variation of the Magnetic Declination at Trevandrum, near 



the Magnetic Equator, and in both Hemispheres, 669. 

 Brown (Dr A. Crum). On the Classification of Chemical Substances, by means of Generic 



Radicals, 331. 



On an Application of Mathematics to Chemistry, 691. 



Brown (Rev. Thomas). On the Arctic Shell-Clay of Elie and Errol, viewed in connection with our 



other Glacial and more recent Deposits, 617. 



