238 ACCOUNT OP THE MINERALOGY 



rent jelly ; while the Apophyllite separates into minute parti- 

 cles, of a semitransparent white *. It .besides varies in refrac- 

 tion, and is in all respects similar to the Mesotype from Puy 

 de Dome, a magnificent specimen of which I had lately the 

 honour to receive from the hands of Monsieur Hauy. 



On the east side of the Bay of Westmanhavn, we found 

 other cavities containing Mesotype. We there also discover- 

 ed a vein of calcareous spar, about two feet in width, from 

 which we detached several specimens ; it was entirely compo- 

 sed of a congeries of crystals, among which were imbedded, 

 rounded masses of amygdaloid. The forms here presented by 

 the carbonate of lime are quite new to the mineralogist, and are 

 particularly described in the late work of the Count de Bouit- 

 non, who has added to his already numerous collection of the 

 crystallizations of that substance, no less than eleven varieties. 

 To his interesting work I beg leave to refer for their detailed 

 description j\ 



Having been compelled to abandon our intention of ascen- 

 ding Skeelingfeld, from the state of the weather, we were like- 

 wise advised not to attempt the open sea, by which we propo- 

 sed to proceed on our journey to Osteroe. We therefore 

 passed over to Wagoe, and paid a visit to the island of Tint- 

 holm. 



The peculiarities of Tintholm are not mentioned *in the 

 translation of Landt, although fully described in the origi- 

 nal. 



* The Apophyllite of Uto in Sweden, as well as of Disco in Greenland, after 

 separating in the acid, swell out in a very remarkable manner, occupying a 

 space very much larger than the original ; but do not combine into a gelatinous 

 mass. 



+ Catalogue de la Collection Mineralogique du Comte de Bournon, London 

 1813. 



