300 Analysis of the Melanie. 
Art. XXIV.—Analysis of the Melanite, from Franklin 
Furnace, Sussex Co, New Jersey, by Henry SeyBert. 
Tus mineral so nearly resembles the Melanite of Fras- 
cati, near Rome, that a description of it is deemed unne- 
cessary. 
Analysis. 
\. 3 grammes of the mineral by calcination ata red heat, 
diminished in weight 0.01 grs. hence we have 0.333 per 
100 of moisture. 
rammes finely pulverized were boiled in concen- 
trated muriatic acid, the solution was reddish brown, the 
insoluble portion became colourless. and gelatinous, ze 
mixture was evaporated to drive off the greater part 0 
excess a a water was then added and the solution was 
e Silica remaining on the a after calcination 
shed “s -06 grammes, or 35.333 pe 
- A portion of the liquor (B) Shieh 4 was of a lemon 
yellow colour, was decomposed with an excess of subcar- 
bonate of ammonia ; the supernatant liquor was decanted 
from the precipitate ‘and tested with phosphate of soda and 
ammonia, but no magnesia was present. The precipitate 
was redissolved, and the sélution after ebullition was added. 
to the preceding liquor, it was decomposed with an excess 
of caustic ammonia, the reddish brown precipitate after 
calcination weighed 1.03 grs. It was calcined with caustic 
potash, the green colour of the solution in water indicated 
a trace of manganese—afterall the alumina was separated, 
the peroxide of iron weighed 0.90 grs. or 3000 per 100.) 
e alumina estimated by difference amounts to 0.13 
grs. or 4.333 per 100. 
D. The lime was Precibxaies from the liquor (C) with 
oxalate of potash; the oxalate strongly calcined gave 0.84 
grammes of lime, or 28.00 per 100. 
_. The constituenis of the Melanite of Foakins ary Be 
100 parts, : 
pole meatier 0.333 comnine oxyeey 
TT 35.333 
C. Peroxide of Iron, 30,000 - - - 
