Dr. Heddle on Mesolite and Faroelite {Mesole). 53 



This being the only mesolite I have seen the crystals of which 

 are large enough for measurement, I forwarded some chips to 

 Mr. Greg: he finds MM' = 89^. 



4. From the cave in Naalsoe, Faroe; in downy tufts. 



On 12 gvs. 



Silica 46-80 



Alumina .... 26-46 



Lime 9-08 



Soda 5-14 



Water 12-28 



99^6 



100-33 

 Formula — 



(NaO, 2CaO) 2Si03 + 3(AF03, Si03) + 8H0, 



the per-ceutages of which are, — 

 Atoms. 

 Silica .... 5 

 Alumina ... 3 

 Lime .... 2 

 Soda .... 1 

 Water .... 8 



2. From near Portree in Skye; in confused white nodules. 



Silica 41-20 



Alumina .... 30-00 



Lime 11-40 



Soda 4-38 



Water 13-20 



TCKVIS 



3. From Dig in Skye; associated with a (t) new mineral 

 and anaicimc. The specimens at this locality are white radiated 

 nodules, filling the whole cavity. Two analyses of difl'event spe- 

 cimens were made. 



* Compare aiial\scs of licrzfluis aii<l Thomson. 



