Anthracite formation of Wilkesbarre, &c. ii 
- If the fire places are properly ease for burning 
this coal, I am well convinced that most of the citizens of 
Philadelphia will give it a pne-tninia “ peel: 
FREDERICK GRAFF, 
We, ne undersigned, do certify, that we are now using 
the stone coal for heating se for cut nails, and find it 
to exceed any other coal or wood fire for this purpose. 
Our practice is, in the morning when we leave the shop 
for breakfast, to throw a quantity of coal on the fires, which 
will be fit for working on our return, and ee last until we 
leave it at nine in the evening, when we.again put on a 
quantity et va until the next ‘noni at breakfast 
time. We find a very great advantage in thus having the 
in the Such 
ea 
fire roxy Amisrenicenaesoaly ser 
fire re perf s about a half 
a fir of coal in twelve hours. 
e find also, that the hoops heat "in half the We that 
they ee with any other fire 
Upon the whole, we think that the Lehigh Coal is much 
the best for nailing, and not attended with one fourth the 
trouble of any other fire, and that the nails are, in our opi- 
nion, superior to others on account of the oe of the 
heat, which does not cause the iron to scale so m 
~ We also cut one serie more nails with this fire tin with 
a wood fire.” 
GEORGE SMITH. 
JOHN MOR 
DANIEL COLKGLASER. 
December 7th, 1814. 
I have used in my business for years past, occa- 
sionally, charcoal, sometimes Virginia coal, and at others 
Lehigh, and from use and careful examination of their 
Virginia, ? 
I find tha yao the only coal I can'depend hore Saree 
ing 0 as with them I am always sure of a true 
and uniform result. I have now used them 
twenty years, 
and would not be to be without them even if they 
cost me two dollars per I own three tilt hammers, 
and have worked Tee-the Dinised States and the state of 
Pennsylvania the last eight years. 
