Vm CONTENTS. 



tempt to shew that the more ancient language of Greece was 

 based upon the Truths of Natural Philosophy. By the Rev. 

 Archdeacon Williams, ...... 98 



On the Poisonous Properties of Hemlock, and its lately discovered 

 Alkaloid, Conia. By Dr Christison, .... 102 



Notes on the Geology of Auvergne, particularly in connection with 

 the Origin of Trap Kocks and the Elevation Theory. By Pro- 

 fessor Forbes, ....... 105 



Notice of a new Compound of Sulphur, which is probably a Sul- 

 phurate of Nitrogen. By Dr Gregory, . . . 106 



On another new Compound of Sulphur, analogous to the Mercap- 

 tan of Zeise. By Dr W. Gregory, .... 106 



On a Curious Phenomenon observed in the Island of Cephalouia, 

 and on the proximate cause of Earthquakes in the Ionian Islands. 

 By Dr John Davy, ...... 107 



Some Observations on Atmospherical Electricity. By Dr John 

 Davy, . 108 



Essay towards establishing the Primary Properties of Parallel Lines. 

 By Mr W. Nichol ...... 109 



On the Mathematical Form of the Gothic Pendant. By Professor 

 Forbes, ........ Ill 



On the Occurrence of Megalichthys Hibberti, in a bed of Cannel 

 Coal in the West of Fifeshire ; with observations on the supposed 

 Lacustrine Limestone of Burdiehouse. By Leonard Horner, 

 Esq., F.R.SS.L. & E., 112 



On the Circular Polarization of Heat, whether accompanied or un- 

 accompanied by Light. By Professor Forbes, . . 113 



Address on the Keith Prize being presented to Professor Forbes. 

 By Dr Hope, V.P., R.S.E., 114 



On the Xon -Hellenic portion of the Latin Language. By the Ve- 

 nerable Archdeacon Williams, .... 122 



On the Sources and Composition of the difiPerent kinds of Gamboge. 

 By Dr Christison ; and on the Botanical Origin of Gamboge. By 

 Dr Graham, ....... 123 



Observations and Experiments on the Coloured and Colourable 

 ^Matters in the Leaves and Flowers of Plants, particularly in re- 

 ference to the principles upon which Acids and Alkalies act in 

 producing Red, and Yellow, or Green. By Dr Hope, V.P., 

 R.S.E., 126 



On Djspncea, and other Sensations experienced on the Summit of 

 Mount Blanc. By Martin Barry, M.D., . . . 129 



Mr Smith of Jordanhill made a verbal communication regarding a 

 change in the relative levels of the land and sea on the West 

 Coast of Scotland, ...... 130 



Memorandum respecting the Polarization of Heat. By Professor 

 Forbes, ........ 130 



On Paracyanogen and its Compounds. By James F. W. Johnston, 

 Esq., ........ 131 



