NOME IV. TUPO. 405 



tals of black schorl, which have received a kind 

 of varnish from fire; of fragments of drosses 

 such as described No. III. ; of chrysolites, some 

 yellow and transparent, and others opake and of 

 dull green colour at their edges -, of small crys- 

 tals of white felspar in rhomboidal laminae, some 

 detached, others united together, and grouped 

 with crystals of schorl, some of them superficial- 

 ly vitrified. The crystals of schorl preserve 

 almost perfectly their natural figure : they are 

 chiefly detached in octagonal prisms, somewhat 

 compressed, and with two broad and one nar- 

 row side, terminated by a dyedral summit with 

 hexagonal faces; they present some slight 

 varieties. 



" This matter, which fell on the 19th of July, 

 did not extend beyond the middle region, where 

 it spread from the S. E. by S. to the S. W. 

 wherever the watery cloud mixed with the smoke 

 iwhich contained it was carried, and from which 

 t was precipitated by the rain. 



" No. VIII. Pieces of lava tolerably compact, Pebbles of 

 f an oval or wedge-shaped form, from two or 

 hree to twelve inches in length, and from one to 

 ix inches in thickness ; the surface vitrified, and 

 exhibiting small pores ; their interior similar to 

 hat of No. II. They resemble pebbles rounded 

 >y water, and are remarkable among the drosses, 



