from the RIVER DEE.. 255 
its weight of carbonate of potath, and expofed for two hours to 
a red heat, in.aporcelain crucible. The mafs, being foftened 
in water, was. digefted. in, muriatic acid. By repeating this 
procefs twice, the whole was diffolved in muriatic acid, ex- 
cept a brownifh-white matter, auhach, being dried in-the open 
abs owe 193 SFaIDSe wv st 
bode, THe muriatic acid folution, hick had a deep yellowith- 
brown colour, was concentrated almoft to drynefs, and then di- 
luted with water. It affumed a milky appearance; but nothing 
was precipitated. Being boiled for fome time, and then fet 
afide, a curdy-like matter fell. It was of a milk-white colour, 
weighed, when dry, 7 grains, and: ass the properties of 
oxide of titanium. -' 
aogy Tue refidual kicgitd being fuperfaturated with ammonia, a 
dark reddifh-brown matter precipitated, which being feparated 
bythe filter, dried, drenched in oil, and heated to rednefs, af- 
fumed the appearance’ of’ a black matter, ftrongly attracted 
by the magnet. It weighed 93-7 grains, and was oxide of 
iron. 
~l aia Tuk: 19.5 grains of refidual powder, being mixed with 
we times its'weight of carbonate of foda, and expofed for two 
hours;to ‘a red ‘heat, in a platinum crucible, and afterwards 
heated with muriatic acid, was all diffolved, except about a 
grain of blackifh matter, which was fet afide. 
5. THE muriatic folution being concentrated by evaporation, 
a dittle white:matter was feparated. It weighed ith of a grain; 
and poflefled the characters of oxide of titanium. 
6. WHEN 
