CONTENTS. 



Description and Analysis of Garolite, a new Mineral Species. By 

 Dr T. Anderson, ..... Page 1 



On the Constitution of Bebeerine. By Dr A. Von Planta, . 2 



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

 Rankine, Esq., . . . . . .3 



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

 Esq. Note as to the Dynamical Equivalent of Temperature in 

 Liquid Water, and the Specific Heat of Atmospheric Air and 

 Steam, ....... 5 



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

 nent. By Professor Simpson, ... .9 



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, . . . . .14 



Notice of a Tertiary Fossiliferous Deposit, underlying Basalt, on 

 the Island of Mull. By the Duke of Argyll, . .21 



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

 Muspratt, ....... 22 



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 In do- 

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

 lugu-Tamulian, Tartar-Japanese, and American Languages, . 24 



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

 George Buchanan, Esq., . . . . .25 



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, . . . .27 



Account of Experiments on the Thermotic ElBPect of the Compres- 

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

 Piazzi Smyth, . . . . . .28 



Theoretical Investigations into the same by W. Petrie, Esq. Com- 

 municated by Professor C. Piazzi Smyth, . . .28 



