TAB, XXII, Upper and Middle Figure, 



SOD A muriata. 

 Muriate of Soda, or Common Salt, 



Class 1. Inflammables. Ord. 2. Mixed. 

 Gen. 4. Soda. Spec. 2. Muriate of Soda, 



B'w. 1. Crystallized. 



Gen. Char. Soda in combination. 



-Spec. Char. Soda combined with muriatic acid. 



-Syn. Common salt. Kirw. v. 2. SI. 



Common salt, sea salt. Bab. 14. 



Stein salz. Emmerl. v. 2. 19. 



Soude muriatee. Haiti/, v. 2. 356. 



Muria montana. Linn. Syst. ed. 12. v. 3. 98. 



Found in abundance at Northwich in Cheshire, where it 

 constitutes very solid strata, more or less mixed with common 

 clay, giving it a dirty hue, or with yellowish or red calx of 

 iron. Its large square crystals are often so transparent and 

 clean as to appear uncontaminated. The miners leave pillars 

 of it to support the roof ; and when they show this grotto, 

 *hey are proud to surprise the spectators, and add lustre to 

 the scene by the display of many lights. 



The middle figure shows the fracture to be cubic, and also 

 some clear pieces lying among the coloured kind. I have 

 none approaching the octaedron or the cubico-octaedron, 

 see Haiiy ; nor do I know that it is found so in Great Britain. 



Salt in sufficient quantity preserves animal substances 

 from putrefaction, but too little is said to promote it. 



Lustre 2 or 3, glassy. Transparency 2, 3, or 4. Hardness 

 4, 5, or 8. Spec. grav. 2,143. Brisson. Soluble in little 

 less than 3 times its weight of water, at the temperature oj 



