224 SALTS. 72. Vitriolum. 



refce flowly on expofure to the air : fpeciiic gr.^vity when 

 cr)rtairized 1,912. when in the ftate in which it is found in 

 the fhops 1,3275. ccMtxins acid 40. oxyde 20. wat'^r 40, 

 B rmun : according to Kir-n.van, acid 20,5. oxyde 40,0, 

 water 39,5. 



Cupri, Of a deep blue colour and very adringent acrid tafte, its 



watery folution when copioully mixed with a folution 

 of volatile alkali becoming a fine fky-blue. 



Vitriolum cupri. Syst. nat, xii, 3. ^, 104. «, 2. 



Virrioluin cupri. WalL fyfi.z. /.20. n. i. 



'Vitriolum veneris- Amcen acad. \ . t. \z. f, \. 



Blue virnou Berkenh. outL p 253. 



Vitriol of copper. Kivvjan w.'meral. 2. p. 22. 



Copper vitriol^ Blue vitriol, Schmeifier miner. \»p. i"]!. 



Sulphat of copper. Thomjln cbem. 2. p. 579. 



2. Light blue, containing iron and copper united with fulphuric 



acid. 

 Vitriolum mixtum, WalLfyfi- 2. /». 26 n 4. a. 

 Vitriolum mixtum. Syft nat . xii. 3. p. 105, ». 4. 

 Vitriol, cupr. et fcrr, Cronft. min^ 123. 2. I. 



3. Deep blue, containing zinc and copper united with fulphuric 



acid. 

 Syft» nat. xii, y p. 105. n. 7. 

 WalL fjst, minsr. 2. p. 26. n 4,d. 

 Vitriol, cuprco-zinceum, Cronft. 123. 2. 4. 



4. Light blue, containing iron, zinc and copper united with ful- 



phuric acid. 

 S\ft^ nat, xii. 3. p. 105. n. 8, 

 WcM. fyti. miner. 2 p, 26. n. 4. b. 

 Cronft. mi.^eral. 123. 2. 2. 

 Mixed vitriol. Kirnvan minercd. 2. ^ 24. 



Found in the copper mines of iVicklonv in Ireland^ in France, 

 Germany ^ Saxony ^ Hunyary, -S^wedeny ScQ. fometimes in a 

 ftate of foiucion, fometimes cryftallized or ftala(5litical : it has a 

 Itrong ftyptic naufeous tafte, and is commonly ufed as a 

 cauftic: itscryilals are 4-iided prifms with rhomboidal faces 

 which are folub'c in f^ur times their weight of cold water, 

 and by expofure to the air they fl lihtly efflorefce, lofe their 

 luilre, and are covered wich a yellowifh-grey powder; they 

 like.'.ife communicate a green colour to flame. A valuable 

 article of conimi.rce is produced by placing thin plates of iron 

 in the waters where it is held in folution; for the acid having 

 a greater affinity with iron than copper, gradually decompofes 

 it, and leaves the copper in its phice. Specific gravity 

 2;?943. contains acid 33. oxyde of copper 32. water 35. 

 ■ Proift^ 



