TITANIUM. 8,5 



passed very slowly through it. The heat of the 

 furnace was found sufficient to produce this ef- 

 fect, though the retort was at some distance 

 from it ; the process lasted six hours. When it 

 was terminated, the glass tube was sealed her- 

 metically, that the sulphuret of titanium might 

 cool, while surrounded with the vapour of bi- 

 sulphuret of carbon. 



Sulphuret of titanium thus formed has a dark 

 green colour. When rubbed against a hard 

 body, it assumes the metallic lustre : the streak 

 is brass yellow. When heated in an open vessel, 

 it burns with a blue flame, giving out the fumes 

 of sulphur, and leaves titanic acid. When heated 

 with nitric acid, nitrous gas is given out, and ti- 

 tanic acid is formed, while sulphur separates. 



1*017 gramme of sulphuret of titanium, when Analyzed, 

 burned on a platinum plate, left 0-757 of titanic 

 acid. Hence, 1-000 would have left 0-7443 ti- 

 tanic acid. 



0-19 of sulphuret of titanium, were digested 

 for eight days in nitro-muriatic acid, till the sul- 

 phur was acidified. The titanic acid was then 

 precipitated by ammonia, and the sulphuric acid 

 by means of muriate of barytes. The sulphate 

 of barytes obtained weighed 0-679. Hence, 

 1-000 sulphuret of titanium would have given 

 3-5737 of sulphate of barytes, equivalent to 

 0-48457 sulphur. 



If we subtract the 0-48457 sulphur from 1-000, 



F3 



