C 59 3 



B. e. The nature of the acid may be detect- 

 ed, by adding a little vitriolic acid, when the 

 nitrous acid will be detached, as defcribed 

 (page 52, a. and 53, a ) 



f. A folution of blue vitriol gives the fame 

 appearances as defcribed (page 57, m.J 



3. MAGNESIAN MURIATE. 



Muriate Acid combined with Magnefia, 



Magnefian muriate, or muriate of magnefia, 

 exifts in fea water and fait fpring waters, but in a 

 more pure ftate in Epfom and limilar waters, is 

 therefore very common. Magnefian muriate has 

 a very bitter hot tafte, is very foluble in water, 

 difficult to chryftalize ; its chryftals are needle 

 fliaped. 



A. a. The magnefian bafis may be detected in 

 waters containing this fait, hy the fame means, 

 and with the fame appearances, as defcribed 

 (page 58, a. b. c. d.) The lime and alkalis, comb- 

 ining with the muriatic acid, detach the magnefia. 



b. By means of a folution of foap in water, 

 the fame appearances take place, as defcribed 

 (page 58, d.) 



B. c. The acid contained in this water may 

 be detected by the means defcribed (page 59, 

 B. e.) The muriatic acid being volatile, is de- 

 tached in an invifible vapour which uniting to 

 the vapour of the volatile alkali, forms a whitifh 

 fmoke, confifting of fal ammoniac. 



d. By adding a little of the folution of frl- 

 ver in nitrous acid, white clouds will appear, ac- 

 I 2 quiring 



