CONTENTS. 



Description and Analysis of GoroUte, a new Mineral Species, By 

 Dr T. Anderson, . . • • • ^^S^ J 



On the Constitution of Bebeerine. By Dr A. Von Planta, . ^ 



On the Vibrations of Plane-Polarised Light. By W. J. Macquorn 

 Rankine, Esq., . • • • ' -n ^ • ' 



On the Mechanical Action of Heat. By W. J. Macquorn Rankinc, 

 Esq. Note as to the Dynamical Equivalent of Temperature m 

 Liquid Water, and the Specific Heat of Atmospheric Air and 

 Steam, . . • • • • ' 



Notice of a Roman Practitioner's Medicine Stamp, found near Ira- 

 nent. By Professor Simpson, . • • " i o 



Astronomical Notices. By Professor C. Piazzi Smyth, . .13 



Farther Observations on Glaciers.— (1.) Observations on the Move- 

 ment of the Mer de Glace down to 1850. (2.) Observations by 

 Balmat, in continuation of those detailed in the Fourteenth Let- 

 ter. (3.) On the gradual passage of Ice into the Fluid State. 

 By Professor J. D. Forbes, . . • ' i * 



Notice of a Tertiary Fossiliferous Deposit, underlying Basalt, on 

 the Island of MuU. By the Duke of ArgyU, . .,' 



Analysis of the Mineral Waters of Baden-Baden. By Dr Sheridan 

 Muspratt, . . • • • • ' 



Traces of an Ethnic Connection between the Basin of the Ganges 

 and the Indian Archipelago, before the Advance of the Hindus 

 into India ; and a Comparison of the Languages of the Indo- 

 Pacific Islanders with the Tibeto-Indian, Tibeto-Burmese, Te- 

 lugu-Tamulian, Tartar-Japanese, and American Languages, . 2-1: 

 Note on the recent frequent occurrence of the Lunar Rainbow. By 



George Buchanan, Esq., . • • • . -o 



On some new Marine Animals, discovered during a cruise among 

 the Hebrides with Robert :Macandrew, Esq., of Liverpool, in 

 1850. By Professors Edward Forbes and J. Goodsir. Commu- 

 nicated by Professor Goodsir, ■ • • • •*< 

 Account of Experiments on the Thermotic Effect of the Compres- 

 sion of Air, with some practical applications. By Professor C 

 Piazzi Smyth, . • • ' t?" r^ 

 Theoretical Investigations into the same by W. Petric, Esq. Com 

 municated by Professor C. Piazzi Smyth, 



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