OF ANTHRACITE CAST IRON. 529 
Out of three specimens of American anthracite 
coal, analyzed by Professor Johnson, the following 
products were obtained— 
«Specimen No. 1, when heated to a temperature suf- 
ficient {o expel the water which it contains, without 
decomposition, lost per CeNt........ssseeeeeseeeeeeeeees 1.915 
When the dried coal is ignited to redness for some 
time in a close vessel, it yields carbonic oxide, and 
carburetted hydrogen with a small portion of sul- 
PIMITI Eee nah aivaenacseenatavuwceocdseeters Sencetetee code 5.068 
The remaining fixed carbon is .......s.esseeceeeeseeeeees 88.187 
SAILGa famssnens esos «rack nenpescr sm 2.589 
AUN Sone ates scawanasoospesnen 1.772 
Earthy matter 4.83 } Peroxide of iron ...........+++ 270 
per cent., viz., Wiiersceweresanseecdce tres veces as 138 
| Magnesia .......essee seescessess 052 
L Protoxide of Manganese...... 009 
100.000 
From the latter numbers it will be perceived, that of the fixed 
ingredients or ashes of this coal, 100 parts will be composed— 
GES Mica Peel ae eine. case 53.604 
e @Aluminays) fscesoeees 05.0 36.687 
» Peroxide of iron............ 5.590 
Be LGINIES eondenseacenoéon sun boca. 2.857 
bo) MIASNGEDasgescveccccnaysesans 1.076 
», Protoxide of Manganese... 186 
100.000 
The ashes of this coal are of a yellowish white, or very 
light buff colour, and very bulky.” 
3X 
