Ezperinenis on Anthracite, Biemhage: fc. 103 
itated ; the latter was separated from» the two former by 
caustic votash. No attempt.was made to ascertain the rela- 
tive proportions of iron and manganese ; this knowledge not 
being considered important. e presence of manganese 
was evidenced by the green colour of the alkaline fusion ; 
and a.rose colour, when acid was added to the liquor. No 
allowance was made for the difference in the degree of ox- 
idation of the iron and. manganese in the substances used, 
and the products obtained, as the amount was less than one 
per cent. where most abundant. 
‘The first experiments made with the globules, were with 
potash, and with carbonate of soda on silver, and on platina 
foil; with these agents I could not produce much effect, but 
by using a small quantity of carbonate of lime, carbonate of 
soda ax, on platina foil; their fusion, whether they 
were coloured or colourless, opaque or Pirwcnn «ee 
in a few minutes. - 
Experiment Ist. A pices of the purest Anthracite “of 
Lehigh, subjected to the blowpipe , presented numerous small 
white globules ; few were tinged with violet, and two or three 
were blackish; the globules did not readily unite with one 
another ; however, by long continued heat, some of the 
globules were obtained of the size of the head of a small 
pin; the greater number of them were ‘but: feebly translu- 
cent, and could be broken by a moderate force; others, 
though few in number, were transparent, hard, and not so 
brittle. The white globules were not magnetic, ex 
when dark spots were present; the blackish ones were 
sagtoticy and like the whole of them could be fractured by 
e surface of the mass whitened, as observed 
in ih: adiuney combustion of this coal, and presented veins 
or layers of the matter of the white globules ; showing that 
_the impurities of the coal were not regularly intermixed with 
~ its carbon, or, upon the supposition of its being fused carbon, 
that its production was extremely irregular. 
With the flux before mentioned, the. different. kinds of 
globules were melted without difficulty. By heating a cen- 
tigramme and a half of the globules in ‘powder, for a long 
time, with caustic potash, about of a centigramme of silex 
was obtained. It manifested itself by its gelatinous appear- 
ance before the water was driven 0 
