ITALY. LETTER XVII. 249 



a yellow fulphur- powder as foon as fcraped with 

 the nail. 



The private cabinet of Dr. BaldaJJari* which 

 is to be delivered after his death to the Aca- 

 demy, contains feveral remarkable curiofuies. I 

 notice, 



1. Native fulphur, in a large yellow, tranfpa- 

 rent cryftal, half an inch diameter, nearly of fherl 

 or columnar form ; from S. Agatha di monteFeltro. 

 A fcarce and precious piece indeed ! 



2. White and black quartz-cryftallizations, py- 

 ramidical on both ends-, (Iris nigra Aldrovandi, 

 lapis Dichonus Mercati in Metallotheca, Ingemma- 

 menti cryflallini appuntati in ambe le parti di Fer- 

 rante Imperato} ; found loofe and detached in the 

 furface of the earth in" many places of the Sanefe ; 

 fuch as, Leceto, al, bagni di S. Filippo, di Cianci* 

 ano, a Belriguardo, &c. 



3. Dark-green quartz-cryftallizations in and on 

 dark- green fodjlag, or ajbeftus fibris abrupfis et 

 conglutinatis (Cr on ft. Mineral. 105), which feems 

 to have dyed or tinged them. Mr. Ealdaffari did 

 not remember pofitively, whether this rare curio- 

 fity came from monte Chrifto, or from Gigtio, two 

 fmall iflands in the Tufcan fea. 



4. Blue quartz-cryftallization, from a copper- 

 jnine in the Sanefe. 



'Shells 



