ON THE COMPOUNDS OF SULPHUR AND OXyCEN. 1 05 



• When expofed to air, it fmokes at firft alraoft as intenfely as It fmokes, and 



the fmoking oxymuriate of tin of Lebavius ; bat the in^enfity [^^j^^^'J^jj^'^'^'^^j 



gradually diminifbes, and, at laft, refembles that of the moft con- dens blue colour} 



t.-entrated muriatic acid a little heated. It is very volatile, f'^" ^^"^ 



lumes by ap- 

 difappearing very rapidly when expofed to a moderate heat, preach of am- 



Its fmell has a ftrong refemblance to that of fea-plants, but '"^"'^J and when 

 is much flronger. The eyes, when expofed to its fumes, are water leaves a 

 foon filled with tears, and acquire the fame painful feeling as fi'i" of fulphur, 

 when expofed to the fmoke of wood or peat. add.^duaile in* 



Its taiie is ftrongly acid, hot, and bitter, affeding the throat foluble flakes 



with a painful tickling. that cominue 



' ^ loft in the air. 



It converts vegetable blue papers to red ; but the change 



takes place flowly, unlefs the paper be dipt into water; the 



paper is not corroded unlefs heat be applied. 



When brought near a phial of ammonia, denfe white fumes 

 of muriate of ammonia make their appearance. If it beheld 

 above a folution of nitrate of filver, yellow flakes precipitate 

 in abundance. 



If a drop of fulpluireted muriatic acid be let fall into a glafs 

 of water, the furface of the water becomes immediately co- 

 vered with a film of fulphur; a greenifli red globiiie falls to 

 the bottom, which remains for fome time like a drop of oil, 

 but at laft is converted into yellow flakes; thefe flakes have an 

 acid tafte, which they do not lofe, though allowed to remain 

 in water for feveral days ; they are very dudile, and continue 

 fo, though left expofed to the air. 



4. To afcertain the conftituents of this liquid I agitated 1 10 Chemical exami- 

 parts of it in a very weak folution of potafb, and then threw "i^„°d"ofr«/ la- 

 the whole on a filter: a yellow du6tile fubfiance was kpa- reted muriatic 

 rated, which adhered very firongly to the filter ; what I could 

 feparate was put on a plate of glafs,and dried gently in the open 

 air. It weighed W. This fubftance had a yellow colour, and 

 refembled half dry oil paint; its tafte was hot; it adhered fo 

 obftinately to the finger, that feveral days elapfed before every 

 trace of it difappeared. When digefied ibr forae time in hot 

 water, it fell into flakes of fulphur, and the water acquired an 

 acid tafie. The flakes weighed only 34-, and poflTefl^ed all tlie 

 properties of common fulphur. The water in which it had 

 been digefted yielded, with nitrate of barytes, a precipitate 

 which weighed 8, indicating the prefence of 1 .92 fulphuric acid 

 with nitrate of filver ; the precipitate amounted to 16, indicat- 

 ing 

 2 



