MiTieralogical Account of the Island of Corsica. 351 



Mean motion of moon's ano- . .j | •« 

 maly for the same intervaf, « j| § c§ 

 385^ 49' 0"- 8 186293. 



Mean motion of the moon from 

 her node for the same interval, 

 390° 40' 13"-9587lCO. 



Periodof 12 mean lunations - 354 12 48 34*205X 



Period of 223 mean lunations, 

 for the restitution of eclipses - 6585 7 42 35*6450 



LXV. Mineralogieul Account of the Island of Corsica ; con^ 

 tained in a Letter from M, Ram passe, formerly an Officer^ 

 in the Cars lean Light Infantry^ to M. Fa u J as de St» 

 Fond*. 



1 SHALL novv endeavour to gratify your desire, commum- 

 cated to me on my leaving Paris, of having some detaik of 

 my mineralogical^ inquiries in Corsica, and particularly 

 upon the orbicular granite of that island, of wbich a single 

 isolated block only has yet been recognised. 



In order to make myself master of the subject, it was ne- 

 cessary to visit the interior of the Pieve d*Orexza. and I first 

 proceeded to reconnoitre the high mountain called Santo-Pie- 

 tro-de-Rostino, from which proceed the enormous masses of 

 quartz mixed with green diallage, with which the bed of the 

 rivulet of the village of Stazzona is encumbered. I shall not 

 at present enter upon a detail of the reasons which should 

 incline us to reject the improper denomination of verdc 

 antico di arezza, which was at first given to this stone. 

 After this visit, I wished to direct my steps ta Liamoiie 

 by the Vleve de Caccia ; but the extremely warm temperature 

 which then reigned hindered me, and it was not until the 

 end of August following that I undertook this journey. 



Before entering into the details of my excursion to Lia- 

 mone, allow me to mention a new rock which I disco- 

 vered in the Niolo : it is of a peculiar texture and composi- 



♦ from Annalis du Museum tTHistoire XatureHe, tome vUi. p. 470. 



tion> 



