“Anthracite formation of Wilkesbarre, &e. = $3 
plates lie over one another in a very confused manner ; 
they readily decompose in a short time on exposure to — 
the atmosphere. 
4. Sand stone, rather soft at first, becoming harder in depth. 
About Aliecn feet of this stratum is exposed, it is similar 
to the No. 7, at Smith’s bed. 
It is evident from the inclined position of the strata, that 
one bed of coal lies over another, the upper being pridently 
of much later formation. 
At Buacxman’s bed, on the east side of the river—dip 
to the north, about 35°—the strata are :— 
1. Argillaceous grit, with particles of mica, ten feet. The 
impressions in this are few, chiefly branches of trees, a 
plant about six feet high, in bloom, occurred in this. 
2. Coal, twelve feet thick. 
3. Argillite, thickness unascertained. 
4, Sand stone, thickness not known. 
5. Schist, with intervening layers of micaceous sand stone 
and argillite, the latter with impressions generally of 
aquatic plants. 
6. Coal, fourteen feet thick. 
7. Argillite, without impressions, thickness not known. 
Letter to Mr. Aurxanper Bronentart, Engineer of 
Mines, Member of the Royal Academy of Sciences, &c. 
Sir, 
Through the medium of the Americar Journal of Science, 
your circular request, addressed to Naturalists and the 
friends of Science, has reached me, and desirous of afford- 
ing you all the information in my power on the subject of 
organized remains which have come under my notice in 
this quarter, 1 have forwarded to you a collection of the 
vegetable impressions of the Anthracite formation, in the 
range of which I reside. 
Engaged myself in formimg a collection, and in figur- 
ing the fossil reliquie of this formation, I have transmitted 
only those of which I have duplicates. If it would be 
pleasing to you to obtain more of them, you have only to 
signify your wish in this respect and you shall be gratified. 
