160 ANALYSIS OF LITHOMAIIGE. 



few feconds into little bits not unlike curdled 

 cheefe, or coagulated fubftances ; but it is not 

 fo minutdy (Jivided as to become plaftjc. $dly t 

 Jt is eafily reducible by fire into u white or red,, 

 dilh flag, which, by frothing up, is conlideiably 

 encreafed in bulk. *tbly. Its fractures are ir- 

 regularly concave or convex. 



JZe Cefcribcs -three varitties only, the Cl- 

 mundic, the Tartarian, and the Lcmnian ; but 

 according to thefe criteria, lie fhould have ad- 

 ded that from Hampihhe, which is a genuine 

 fuller's earth. This however ho never law, as 

 the exportation of it is prohibited ; and, truft- 

 ing entirely to the defcription of others, he has 

 ranked it in general amonjj the ubilergents. 

 Specimens , of all thcie, except the Tartarian, 

 are in the collection of minerals at the academy 

 of Upfal ; and it is their compofition and proper- 

 ties that we arc now going to explain, in order 

 to determine wtcrherthcy conflitute more than 

 one fpecies of argillaceous earth, hi our exa- 

 mination of fuller's earth we have bellowed par- 

 ticular attention; as, from its great ufe in the 

 preparation of woollen cloth, it is of importance 

 to uiulcrdund it thoroughly, that, whenever it is 

 wanted, the proper kind may be readily dillin- 

 guiflicd. 



