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239 



XV. Description of a Vegetable Impression found in 



the Quamj of Craigleith. By Thomas Al- 

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



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. 



XVn. 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. jwn. F. R. S. 

 Edin. M. W. S. 8fC. - - 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. 



XIX. On the Mineralogy of Disico 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 Fergusspn, M. D. F. R. S- 

 Edin. Inspector of Army-Hospitals, 273 



XXI. Description of some remarkable Atmospheric Re- 

 flections a7id Refractio7is, observed in the Green- 

 land Sea. By William Scoresby, Esq. j^wnior, 

 F. R. S Edin., - - 299 



XXII. 



I- yil-^V 



