ON MANGANESE 85 



process, as well as when united with sulphur alone (Sec. 

 xxxvii. ), the manganese bears a very strong resemblance to 

 a metallic substance. It seems as if it cannot combine with 

 sulphur before it is united with phlogiston ; it therefore first 

 attracts the phlogiston of the sulphur, and the vitriolic acid, 

 still retaining some of this principle, goes over in the form 

 of volatile sulphureous acid, and the remaining sulphur is 

 afterwards fixed by the phlogisticated manganese. By 

 calcination in the open air, this is decomposed, as well as 

 the compounds with orpiment and antimony, and the 

 vitriolic acid unites with the phlogisticated manganese 

 (Sec. xxxvii.). 



SECTION XLI. WITH CINNABAR AND CORROSIVE 

 SUBLIMATE. 



(a) A portion of finely pounded manganese was mixed 

 and distilled with an equal quantity of powdered cinnabar. 

 A penetrating volatile sulphureous acid came over, and a 

 little cinnabar was sublimed into the neck of the retort, 

 which was followed by quicksilver. The residuum showed 

 the same properties as that mentioned, Sec. xxxvii. (b) 

 Manganese, distilled with an equal quantity of corrosive 

 sublimate, underwent no change ; (c) but, mixed with an 

 equal quantity of mercurius dulcis and sublimed, there arose 

 first corrosive sublimate, and then mercurius dulcis, into the 

 neck of the retort. Now, as mercurius dulcis contains crude 

 mercury united with phlogiston, but corrosive sublimate 

 consists of calx of mercury and muriatic acid, it follows 

 that, if part of the phlogiston of the mercurius dulcis is 

 taken away, a kind of corrosive sublimate will be produced ; 

 and this portion of phlogiston is taken away in the present 

 case by the manganese. 



