On the Anthracites of Europe and America. . $i 
make a trial of it, which he did in his own way, and when the 
operation, as he thought, was finished, he found that ve great- 
er part of the contents was vitrified, or converted in slag, 
which adhered so jeaely to the sides of the kiln, Hat’ it could 
be retnoved only by crow bars. At first he could not be per-_ 
was careless about the quantity. The consequence was, as 
may naturally have been expected, that the heat produced was 
So intense as to vitrify the prea. part of the limestone, whic! 
adhered to the sides of the Such an obvious effect 
how ever, which would ne hase pecutied had the coal bean 
app ied 3 in proper proportions, so far from satisfying the own- 
the certainty of success, only prevented him from 
making a second attempt. 
Much such another circumstance as the above, occurred in 
the neighbourhood of Boston, where there are extensive 
brick kilns, but where, also, there exists a great scarcity of 
wood for fuel. It was not without difficulty, however, that 
one of the proprietors consented to make trial of the Rhode- 
Island coal. ‘The process of burning went on as usual; but 
when the operation was supposed to be completed, and they 
came tc examine the result, it was found that the surface of 
the bricks was completely vitrified, and that they adhered to 
each miner | in one solid mass, to the great disappointment of 
the owner. It was impossible, however, not to see and be 
ene nsed from this experiment, that the failure arose, not 
m any ‘defect i in the coal, but from the excessive wate in- 
el 
38 € quantities are still siecle, sheet pacer ie 
re a the market? ‘To this I will answer, enite” 
‘are better burnt than the American brick; and this arises 
from the use of culm, a very inferior kind s coal to that 
which is ee in this country. 
In the essay, which I published several year ago, on the 
application 8F Rhotle Island ‘coal to the arte and’ manufac 
tures of this pasty, I pointed it out as peculiarly calculated 
VOL, XIL—NO 11 
