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XI. Experiments on Allanite, a new Mineral from Green- 

 land. By Thomas Thomson, M. D. F. R. S. E. Fellow 

 of the Imperial Chirur go-Medical Acidemy of Peters- 

 burgh. 



[Read Nov. 5. 1810.] 



ABOUT three years ago, a Danifh veilel * was brought into 

 Leith as a prize. Among other articles, me contained a 

 fmall collection of minerals, which were purchafed by Thomas 

 Allan, Efq; and Colonel Imrie, both members of this Society. 

 The country from which thefe minerals had been brought was 

 not known for certain ; but as the collection abounded in Cry- 

 olite, it was conjectured, with very coniiderable probability, 

 that they had been collected in Greenland. 



Among the remarkable minerals in this collection, there was 

 one, which, from its correfpondence with Gadolinite, as defcri- 

 bed in the different mineralogical works, particularly attracted 

 the attention of Mr Allan. Confirmed in the idea of its being 

 a variety of that mineral, by the opinion of Count Bournon, 

 added to fome experiments made by DrWoLLASTON, he was in- 

 duced to give the defcription which has fince been publifhed in 

 a preceding part of the prefent volume* 



About a year ago, Mr Allan, who has greatly diftinguifhed 

 himfelf by his ardent zeal for the progrefs of mineralogy in all 



A 2 its 



* Der Fruhling, Captain Jacob Ketelson, captured, on her passage 

 From Iceland to Copenhagen. 



