Anthracite formation of Wilkesbarre, Se. 15 
I find, in using this coal, a great saving of labor, and the 
copper is not so liable to be injured as by wood, because 
there is not so much danger of burning the still, or running - 
foul at the worm. 
My mode of setting stills for this kind of coal, is as fol- 
lows :—I draw a circle sufficiently large to give room for 4 
circular flue, round the body of the still, of about four inches, 
leaving an opening of twelve inches wide and two feet deep, 
for an ash hole; I then raise the ash hole twelve inches 
high, and put on my grate, which is made of inch square 
bars, placed about three-fourths of an inch apart, and a 
sufficient number to cover the ash hole. I prefer to have 
the square bars riveted (instead of putting them in loose as 
some do) into a cross bar at each end, to keep the bars sta- 
tionary ; 1 then put up a cast iron door frame in front, of 
fifteen inches wide and twelve high, with a cast iron door 
to it; then raise the side wall and back of the furnace a 
little flaring to the height of the cast iron door frame, level- 
ling the top; then put down four brick for bearers, on which 
set my still; then drawing a flue of about four inches round 
the sides of the still, enclose it at the top rise of the breast. 
This mode I find to answer a very good purpose for stone 
coal. It is not necessary to have a slider or damper in the 
chimney, because by closing the front of the ash hole, and 
epening the door of the furnace, it will sufficiently check 
the operation of the fire when required. 
GEORGE HAINES. 
March 10, 1815. 
I have used the Lehigh coals. They produce a greater 
degree of heat than any other fuel I am acquainted with— 
they give no smoke—contain no sulphur. I have tried 
them for my steam engine, and find them to exceed all 
others for keeping a steady fire, driving my engine well.— 
I find that iron heated by these coals, does not scale, as when 
heated with Virginia coals; therefore, I think a boiler will 
last as long again; and as they make no smoke, no soot 
(which is a non-conductor of heat) can accumulate on the 
outside of the boiler. While the boilers are clear of soot, 
less fuel will produce steam to drive the engine. The fur- 
nace must, however, for this purpose, be properly con- 
structed for them. 
