CONTENTS. Ill 



Page 



XV. Description of a Vegetable Impression found in 



the Quarry of Craigleith. By Thomas Al- 

 lan, Esq. F. R. S. Lond. & Edin. - 235 



XVI. Account of the Native Hydrate of Magnesia., 



discovered by Dr Hibbert in Shetland. By 

 David Brewster, LL. D. F. R. S= Lond. & 

 Sec. R. S. Edin. - 239 



XVII. Description of a Magnetimeter , being a New 



Instrument for Measuring Magnetic Attrac- 

 tions, and finding the Dip of the Needle ; 

 with an Account of Experiments made with 

 it. By William Scoresby, 'Esq. jun. F. R. S. 

 Edin. M. W. S. #c. - - 243 



XVIII. Account of the Establishment of a Scientific 



Prize by the late Alexander Keith, Esq. of 

 Dunottar. In a Letter from the Trustees to 

 Sir Walter Scott, Bart, P. R. S. E. - 259 



PART SECOND. £- 1*1* V ' 



XIX. On the Mineralogy of Dislw Island. By Sir 

 Charles Giesecke, F. R. S. Edin. M. R. I. A, 

 Professor of Mineralogy to the Royal Dub- 

 lin Society, and Member of the Royal So- 

 cieties of Copenhagen, Upsal, &c. &c. 263 

 XX. On the Nature and History of the Marsh Poi- 

 son. By William Fergusson, M. D. F. R. S. 

 Edin. Inspector of Army-Hospitals, 273 



XXI. Description of some remarkable Atmospheric Re- 

 flections and Befr actions, observed in the Green- 

 land Sea. By William Scoresby, Esq. junior, 

 F. R. S Edin., - - 299 



XXII. 



