CONTENTS. XV 



Contributions to Optical Meteorology. No, I. On the Polariza- 

 tion of the Light of the Sky, By Professor Forbes, . . 324 



Farther Researches on the Voltaic Decomposition of Aqueous and 

 Alcoholic Solutions, By Professor Connell, . , , 326 



On the Preparation of Paracj'anogen, and the Isomerism of Cyano- 

 gen and Paracyanogen. By Samuel Brown, M.D, Communi- 

 cated by Dr Christison, , , , , . 328 



A Notice was communicated by Mr Milne, from Joseph Atkinson, 

 Esq., of results obtained with Rain-Gauges of difterent forms, 329 



On the Sea-Level of the Neapolitan Coast. By Sir John S. Forbes, 

 Bart., .,...,.. 331 



On the Supposed Progress of Human Society, from Savage to Civil- 

 ized Life, as connected with the Domestication of Animals, and 

 the Cultivation of the Cerealia. By John Stark, Esq., . 332 



On the Parallel Roads of Glen Roy, with an Examination of Mr 

 Darwin's Theory of their Formation. Part I. By Sir Thomas 

 Dick Lauder, Bart., ,...., 334 



On the Polarizability of Heat from diflPerent sources. By Professor 

 Forbes, ........ 334 



Account of the Fossil Species of the genus Solarium, Lamarck, 

 found in the Supercretaceous Group in Italy. By M. Le Cheva- 

 lier Michelotti of Turin. Communicated by Dr Traill, . 334 



On the Parallel Roads of Glen Roy, with an Examination of Mr 

 Darwin's Theory of their Formation, Part II. By Sir Thomas 

 Dick Lauder, Bart., ...... 335 



On tlie Visibility of rapidly revolving Lights, made in reference to 

 the improvement of Lighthouses, By Alan Stevenson, LL.B., 

 Civil Engineer, . . . . . . . 336 



On the Theory and Construction of a Seismometer — an Instrument 

 for measuring Earthquake Shocks and other Concussions. By 

 Professor Forbes, ...... 337 



On the Circulation of the Blood, and the difference of the Laws of 

 Fluids moving in living and dead tubes. Part I. By Sir Charles 

 Bell, ........ 339 



Experimental Researches on the Production of Silicon from Para- 

 cyanogen. By Samuel Brown, M.D. Communicated by Dr 

 Christison, ....... 341 



On the Anatomy of the Amphioxus lanceolatus of Yarrell. By 

 John Goodsir, Esq. Communicated by Professor Syme, . 344 



On the Circulation of the Blood, and the difference of the Laws of 

 Fluids moving in living and dead tubes. Part II. By Sir 

 Charles Bell, . . . . . . ' . *33i 



On a Peculiar Structure observed by the Author in the Ice of Gla- 

 ciers. By Professor Forbes, ..... *332 



Report of a Committee on the Papers of David Hume, bequeathed 

 to the Society by the late Baron Hume. Communicated by the 

 Council, ....... *338 



On the Optical Properties of Greenockite, by Sir David Brewster, 

 in a Letter to Lord Greenock, .... •342 



