208 An Analysis of two Mineral 
newed by removing the globule to a silver spoon: 
fused with soda and nitre it makes a blue or a green 
globule.. As the sediment may be procured in 
‘sufficient quantity, Irepeated the last. experiment 
ona larger scale: some nitre being mixed. with it, the 
mass was pulverized and fused in a crucible ;. when 
taken out of the fire it was green, and. dissolved! in 
water, to which also it imparted a fine green colour: 
inva day or twoa yellow ochre was deposited, when 
the solution became, blue ;; from this liquor a pow- 
der subsided by exposure to the air;, which was 
manganese. * ) 
o. Pursuing the observations of the elect of the 
mineral acids confirms this conclusion. I mixed 
some of the sediment, with powdered charcoal, and 
exposed the mixture to a strong red. heat: it became 
of a light brown. colour, and now, proved to. be 
readily soluble in all the mineral acids.t | With the 
muriatic and nitric it formed a gelatinous com- 
pound. The sulphuric acid diluted was soon satu- 
rated; the liquor was evaporated, and deposited 
white crystals, the form of which is rhomboidal. 
This is a triple salt, the base of which is iron and 
manganese. — If there be a small excess of acid the 
taste of this salt is very like that of sulphat of argill. 
The same salt may be obtained by boiling the sulphuric 
* See Scheele’s Essay on Manganese, xxxvi. Be 
+ Ibid, xxxviri, A, 
= 
