CONTENTS. V 



On the Action of Soluble Lead Salts on Natural Waters. By Pro- 

 fessor Connell, . . . . . .62 



Claudia and Pudens ; an attempt to shew that the Claudia men- 

 tioned in St Paul's Second Epistle to Timothy, was a British 

 Princess. By Archdeacon Williams, . . .63 



On the Decomposition and Dispersion of Light within Solid Bodies. 

 By Sir David Brewster, K.H., . . . .64 



A few Remarks suggested by Professor Forbes's Description of the 

 eilects of Glacial Action among the Cuchullin Hills, and Jlr 

 Maclaren's views of the facts observed by him at the Gareloch. 

 By Sir 0. S. Mackenzie, Bart., . . . .65 



Remarks on certain grooved surfaces of Rock on Arthur's Seat. 

 By the Rev. Dr Fleming, ..... 67 



Biographical Notice of the late Sir John Robison, K.H., Sec. 

 R.S. Ed. By Professor Forbes, .... 68 



On a method of rendering Magnetical Instruments Self-Registering. 

 By J. A. Broun, Esq. Communicated by Sir T. M. Brisbane, Bart., 79 



Verbal Notice respecting the Thyroid, Thymus, and Supra- renal 

 Bodies. By Professor Goodsir, , . . .80 



On the recent Scottish Madrepores, with Remarks on the Climatic 

 Character of the Extinct Races. By the Rev. Dr Fleming, 82 



On the principle of Vital Affinity, as illustrated by recent Obser- 

 vations in Organic Chemistry. Part L By Dr Alison, . 83 



On the Personal Nomenclature of the Romans, with an especial re- 

 ference to the Nomen of Caius Verres. By the Rev. J. W. 

 Donaldson. Communicated by Bishop Terrot, . . 87 



On the appearance of the Great Comet of 1843, at the Cape of 

 Good Ilope, with illustrative Drawings. By Professor Smyth. 

 Communicated by the Secretary, , . . .87 



On the Existence of Fluorine in the Bones from Arthur's Seat. By 

 Dr G. Wilson, . . . . . .88 



On the Composition of the Bones from Arthur's Seat. By Dr Christison, 88 



On the Description of Oval Curves, and those having a plurality of 

 Foci. By ]Mr James Clerk Maxwell ; with remarks by Pro- 

 fessor Forbes. Communicated by Professor Forbes, . . 89 



On the Influence of Contractions of Muscles on the Circulation of 

 the Blood. By Dr Wardrop, . . . .91 



On the Solubility of Fluoride of Calcium in Water, and the relation 

 of this property to the occurrence of that Substance in Minerals, 

 and in recent and Fossil Plants and Animals. By Dr G. Wilson, 91 



On the Constitution and Properties of Picoline, a new organic base 

 from Coal-Tar. By Dr T. Anderson, . . .94 



Xotice of Polished and Striated Rocks recently discovered on 

 Arthur's Seat, and in some other places near Edinburgh. By 

 David Milne, Esq., . . . . .95 



Results of the Makerstoun Observations, No. II. On the Relation 

 of the Variations of the Vertical Component of the Earth's Mag- 

 netic Intensity to the Solar and Lunar Periods. By J. Allan 

 Broun, Esq. Communicated by Sir T. M. Brisbane, Bart., . 97 



Two Verbal Notices. (1.) On the Geology of Arthur Seat. (2.) 

 On the Dentition of the Walrus. By the Rev. Dr Fleming, 98 



