MINERALOG Y. 



98 



and is faid to be ufcd for waining 

 inftead of foap. 

 B. Cf very fine particles : Fine Stone 

 Marrow. 

 a. Yellowifri brown, "Terra Lemnia, 



Is of a (Killing texture, falls to 

 pieces in the water with a crackling 

 noife ; it is more indurated than the 

 precedent, but has otherwife the 

 fame qualities *■. 



SECT. LXXXV. 



C. Bole, Bo Jus. 



Is a fine and denfe clay of various colours, 

 containing a great quantity of iron, which 

 makes it impoiTible to know the natural and 

 fpecitical qualities of the bole itielf, by any 

 eafy method hitherto in ufe. It is not eafily 

 foftened in water, contrary to what the por- 

 celain and the common clays are {A. & E.) y 

 but either falls to pieces in form of finall 

 grains, or repel:, the water, and cannot be 

 made ductile. In the fire it grows black, 

 and is then attracted by the load-frone. 



* This cannot properly be called a fuller's earthy fince it 

 her is of that kind ufcd in the fulling bu£nefs, rior is 

 ly to be applicable to it £. It is, befides, a ve.ry fcarce 

 clay. It is not found indurated, fo far as I know ; and if 

 it fhculd at any time be difcovcred, it will be neceiTary to 

 examii.e, if it is not a Zeolites (or the eighth order), or at 

 ltaft very nearly approaching to it, in regard to the effecls 

 both undergo in the iire. • 



X A ? tfr- beft fct of Faller*i Earth did no* com* into our author's hands, 

 it :s no wo-d-r thac he excl-ides it from its <»ue ptace, 'I he true FuJkr's 

 Earth of England is exactly J:ke the ftone marrow in all the above- 

 neottoard pro-.er'ic= • and in regard to the tex'.ure 2nd colour, it ecznes 

 tKixtH :o the above- deuribed coarfe ftor.e marrow. £. 



SECT. 



