ANALYSES OF MINERALS. 229 



Siliceous guhr from the Isle of France. Siliceous guhr. 



Silex 72 



Alumine 2 5 



Oxide of iron 2-5 



Water 21 



98 



A green mineral, having the appearance of a sandstone, from Green sand* 

 Spessart. "''"^• 



Silex ., 85-25 



diamine 1 



Oxide of iron. , 7 



Water 5 



• 98-25 



Hepatite from Andrarum. Hepatite.- 



Sulphated barytes. 85-25* 



! lime 6 



Oxidulated iron 5 



Alumine 1 



Charcoal 050 



Loss, including water and sulphur. . . 225 



100 



Botryolitef. 



Silex 30 



Lime.. 395 



Boracic acid I3'5 



Oxide of iron 1 



Water 6'5 



Gfapest<Hie. 



96-5 



•IatheJ.de Phis. 25* 8. This being evidently wrong, the fi- 

 gures probably had fallen out and been replaced erroneously- by the 

 pressmen; and, as the loss is noticed, the whole sum should of course 

 be 100. From the appearance of the figures too, there being a vacancy 

 for one, I have little hesitation in correcting it as above. — C. 



f See Journ, vol, XXVI, p. 273, for a description of it.— C 



Zircon 



