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a2 Aathracile Coal of Pennsyloaniu 
ZIn our domestic commercial language, the anthracite of 
Bennsylvania is called Wilkesbarre, Susquehannah, Lehigh, 
and Schuylkill coal, and by other names, having reference to 
ihe principal places from which it is obtained. Although 
Pennsylvania is stored with this mineral to an unparalleled ex- 
tent, it is found also, abundantly, in Rhode Island, and more 
or less, as is said, in Massachusetts, and other parts of the 
United States. 
It is not my object, at this time, to give a precise descrip- 
them, and there are x7 rah in their properties more or less 
conspicuous, which adapt them to different uses. 
In mineralogical books, the anthracite is usually described 
as burning with little or no flame, and it is of course inferred, 
that such varieties of coal afford little or no inflammable gas.* 
Phis is substantially true of many re of anthracite ; 
but, in observing the combustion of that of Pennsylvania in 
the — stove, (or, more properly speaking, in the chemical 
which is now employed for warming — 
1 eR from the first, struck with the abundance and 
pm boanaser of the flame. 1 first observed this fact in 
the Lehigh coal, but i is certainly not less remarkable in the 
Sehuylkill, This led me to make a few easy experiments on 
the quantities of gas afforded by severa) varieties of mineral 
il. The 1] specimens of coal were heated, separate- 
77a 
v ‘iron tubes, about one inch in the interior dia- 
meter, stopped with a welded iron plug at one end—coated 
with a fire lute of sand and clay, connected by a flexible lead 
tube, witha hydro-pneumatic cistern, and placed in a Black’s 
Gnivereal furnace, Ravi aving a flue of 20 feet in height, and af- 
fording a heat which is above that necessary to melt cast iron: 
the furnace was allowed to draw with nearly’ io bie pow- 
er. The Lehigh coal, that of Will he Schuylkill 
coal, of each 876 rains, or about two pr were ex] 
to the heat of the He rnace in different tubes,t the result was 
WS: 
ange rama burns sels and with difficulty, yielding litileor no 
mM as it without flame, it cannot ae in rey 
— Iebinces””- Cloovelandly Mineralogy, 2d ed. vol. Il. page 499 to 
The foreign system: ree logy gi eer me y the same account 
of anthracite. " 
+The Lehigh andSchuyikill coal were in the furnace at the same time. 
tion of our i Sm there is a considerable variety among 
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