SALTS. 72. Vitriolum. 



225 



rerri. 



Urreum. 



tarium. 



Green, its Watery folution depofiting an ochraceous fedi- 

 ment when mixed with a loliition of foda, and a blue 

 one with pruiliate of linu, made bl^ckifli by tindure 

 of galls. 



Vitriolum martiale. ^yft. nat. xii. 3. p, 104. «. i. 



Vitriolum ferri. WalLfyst, 2. /. 22. /.-. 2. 



Vitriolum martis. Cronjl. 122. 2. I. i. I. 



Green vitriol. Berkcnhout OittU p. 255. 



Vitriol of iron. Kirivau minerals 2. p. 20. 



M^atial vitriol. ScbmeiJ/er mirier^ l.p.zyz. 



Sulphatof iron. Ihom/bn chew. ^. p^ S^ 



Sulphate of iron. Sovjeriy Brit. min. t. 23. 28. 



Found in Britain arid various parts of the continent, in grottos, 

 caverns, and galleries of mines, in the form of pale green 

 crylbls, or in a grey or yeilowifh or reddifh-grey effloref- 

 cence, or ftakditical or capillary, and moil commonly mixed 

 with copper zinc or alum ; it is alfo found in folution ; when 

 pure it cryftalLzes into rhomboidal green tranfparent prifrns 

 which are infoluble in aLohol : when heated it melts, gra- 

 dually lofes its water of cryilallization, and with a ilrong 

 heat there remains a red powder formerly known by the name 

 G^ colcothar of 'vitriol : fpecific graviiy 1,8399, contains acid 

 $9. oxyde 23. vVater 38. Bergman, 



Combined with earth, its watery folution made blackifh 

 by a mixture of tin6lure of galls. 

 Vitriol, terra mirierali?. WalLfyji. 2,^.26. 

 Found in Italy and Hungary^ of a yellow, red* blue, green, or 

 black colour: the earth with which it is mixed is generally 

 argillaceous. 



Mixed with ftones which are not (hiftofe, its watery^folu- 

 tion made black by a mixture of tincture of gails. 



Vitriol, mineralis. lap. 5y/?. nat. xii. 3. p. io6- «.8. 

 Vitriol, lap. mineralis. Wall./yji. 2. p. 27. n. 6. 



1 . Of a red colour. Calcitis. 



2. Of a grey colour. Sory, 



3. Of a black colour. Melanferia, 



4. Of a yellow colour, MZ/y. 



Found on mount Rammeljhurg in Hercynia, and ia produced by- 

 pyrites which have mouldered in the air. 



VOL. VII. — F f 



