VI CONTENTS. 



On the Mean Height of the Barometer in different Latitudes. By 

 Professor Hansteen of Christiania. Communicated in a Letter to 

 the Secretary, . . . . • .101 



On the Extent to which Fluoride of Calcium is Soluble in Water at 

 60'' F. By Dr George Wilson, . . . .102 



New Observations on the Glaciers of Savoy. Part I. By Professor 

 Forbes, . . . . . . .103 



New Observations on the Glaciers of Savoy. (Concluded). By Pro- 

 fessor Forbes, ...... 107 



On General Differentiation. Part IIL By the Rev. Professor 

 Kelland, . . . . . . .108 



Extracts from a Letter of Baron Berzelius. Communicated by Dr 

 T. Anderson, . . . . . .108 



On the presumed long-continued Presence of Arsensic in the 

 Human Stomach. By Dr Gregory, . . .110 



Notes on the Superficial Strata of the Neighbourhood of Edinburgh. 

 Bv the Rev. Dr Fleming. (Commenced.) . . .110 



An Attempt to Elucidate and Apply ]\Ir Warren's Doctrine re- 

 specting the Square Root of Negative Quantities. By Bishop 

 Terrot, . . . . . .111 



Notes on the Superficial Strata of the Neighbourhood of Edinburgh. 

 (Concluded.) By the Rev. Dr Fleming, . . .111 



Speculation respecting the origin of Trap-Tuff, the Cause of Earth- 

 quakes, and of Partial Changes of the Bed of the Ocean. Part L 

 By Sir G. S. Mackenzie, Bart., . . . .114 



On the Principle of Vital Affinity. Part H. By Dr Alison, . 114 



Speculation respecting the origin of Trap-Tuff, the Cause of 

 Earthquakes, and of Partial Changes of the Bed of the Ocean. 

 Part II. By Sir G. S. Mackenzie, Bart., . . .115 



On Vital Affinity. Parts II. and III. By Dr Alison, . 117 



On the Co-existence of Ovigerous Capsules and Spermatozoa in the 

 same individuals of the Hydra Viridis. By Dr Allen Thomson, 123 



On the Parallel Roads of Lochaber ; with Remarks on the Change 

 of relative Levels of Sea and Land in Scotland, and on the De- 

 trital Deposits in that Country. Part I. By David Milne, Esq., 124 



On the Course of Observation to be pursued in future at the Royal 

 Observatory of Edinburgh. By Professor Smyth, . 126 



Observations of Terrestrial Temperature made at Trevandrum Ob- 

 servatory, from May 1842 to December 1845. By John Cal- 

 decott, Esq. Communicated by Professor Forbes, . . 127 



On the Temperature of WeUs and Springs at Trevandrum in India 

 (Lat. 8° 31', Long. 5^ b"'). By Major-General Cullen, Madras 

 Artillery. Communicated in a Letter to Professor Forbes, . 128 



Chemical Notices. By Dr Gregory, .... 129 



Remarks on the Hypothesis of Progressive Development in the Or- . 

 ganic Creation. By Sir G. S. Mackenzie, Bart., . . 130 



On the Parallel Roads of Lochaber ; with Remarks on the Change 

 of relative Levels of Sea and Land in Scotland, and on the De- 

 trital Deposits in that Country. Part II. By David Milne, Esq., 132 



Verbal Communication on Fossils of the Lias Formation, from 

 South Africa. By the Rev. Dr Fleming, . . .133 



