SALTS. 67. Muria. 213 



earths, and may he purified by dropping into itnrfta folution 

 of carbonaTe of barytes, then of Carbonate of ibda, as long as 

 any prsecipitate continues to fall -, then fcparate the prarci- 

 pitare by filtration, and evaporate flowly till the fait tiyftp.I- 

 lizes : it is foiuble in foniethine lels than three rimes its vveiphr 



* • • • ^ 



of warer: ipcvific gravi.y 2.120. contains acid 52. foda 42". 

 water of crylUUizuion 6. Bergman. 



impura. Fixed, decrepitating in the fire, dry, producing fu'phate 

 of foda when faiuraled wilh fulphuric aciil, mixed 

 with various earths. 



I, Muria terra mineralis. Wall. (yst. 2. p 54. n 2. 



Z. Maria lapide mineralif. IValK/yft. 2. p 55. n. 3. 



Muriat of alumina. Thumfm chctn. 2. p. 331. Kirixan z, p. 36, 



Found in the Ne^vil Holt n^vafers and in the falt-pits of Sahjburg^ 

 and is a coarfer variety of the Inft from its being much mi:\cd 

 With gypfum, common mould, clay ?nd other eaiihi- : its 

 talk is aftringent. 



febrifuga* Fixed, decrepitating in the fire, forming muriate oi potafs 



with fulphuric acid. 



Prouft beytr,z. Chem ann. 3. p. 446. 



Muriated Tartarin. Salt of Sylviu.s. Khnjoan z. p 50. 



Muriate of Potafh. SchmeiJ/e^ mineral. i./>. 27S. 



Muriat of Potafs. Ihomfon chem. z. p. 311. 



Found in the environs of W^fidrid, and in fome mineral waters 

 in 'Normandy: it has a diOgreeable bitter iih taile, and when 

 difiblved and cryftallized forms cubes whic'-. are of:cn irre- 

 gular: it was formerly known in the fhop^ by the name of 

 febrifuge or digefii've fah : fpecific gravity 1,036, contains 

 acid 31. potafs 61. water 8. Bftgman, 



ammoniaca. Of an acrid pungent urinous tafle, when heated fubliming 

 into a white fmoke, rubbed with quicklime exhalin 

 an alkaline odour, its cryftals deliquefcing in the^^ir. 

 Sal alcali volatili faturatum. Cronst. ?n:neraL 132. 

 Sal ammoniac. Kirnjoan mineral. 2 />. 53. 

 Muriate of Ammonia. SchmeiJJer min. i. p. 278.- 

 Muriat of Ammonia. Thor-fon chefn. 2, p. ^z^. 

 Common Sal ammoniac. Berkenhout Qutl. \. p. 253, 



i. Concrete in flowers or thin layers, 

 Wall.fyit min. 2. p. yj. n. i. 



2. Concrete in fmall compa(ft maiTcs, 

 Wall. fyft. min. 2. p. 78. «. 2. 



Found in coal-pits in various psrts of Britmn» but principally 

 in the interior parts of JJia and Africcy and in the ne',.'h- 

 bourhood of volcanos ; rarely pure, white, and tranfpareat. 



■J 



