Prof. Johnson's Report on the Bradford Coal Field. 137 
Arr. XVIII.—Notice of a Report of a Geological, Minerolesta 
and Topographical examination of the Coal Field of Carbon 
creek, with an analysis of the Minerals, accompanied by Maps, 
Profiles and Sections ; by Waurer R. Jounson, Civ. and Min. 
Eng. and Prof. of Chem. and Nat. Phil. in Penn. Coll., Phila. 
We subjoin a notice of the valuable report of Prof. Waurer R. 
Jonson, whose title is given above. It announces a-very impor- 
tant deposit of coal, one among the many with which Pennsylva- 
nia abounds and which must long contribute to sustain domestic 
arts and industry. 
In Bradford county, saponin to the New York. state ing 
is the northeastern extremity of the range of bituminous coal 
formations, which extend quite across the state from this point 
to Somerset county on the borders of Maryland. It also termi- 
nates the line of coal basins which, with perhaps some interrup- 
tions, reach nearly the whole length of the state, on its north- 
ern border. ‘This coal deposit being now about to enjoy the ad- 
vantage of a near connexion with the Pennsylvania public works 
in progress along the north branch of the Susquehannah river; 
its situation is of great public interest to that portion of the state 
of New York which adjoins Pennsylvania, near the head waters 
of the Susquehannah river, and indeed to the whole central por- 
tion of New York, including the salt district, from which fuel 
furnished by the forest is already so remote, as to become a con- 
siderable drawback upon the profits of the manniactamnts The 
consumption of four hundred thousand cord: 
in the ce ee must indeed require a vast extent of 
country to be rved ini ne growth 
should keep fate So swith the consumption. 
The geological character of the district traversed by Prof. J ie 
-son, is similar to that of most other coal fields of Pennsylvania, 
being a secondary formation, embracing a coal trough two or 
three miles in breadth and of six or seven in length, its south- 
western termination not being yet very accurately ascertained. 
The attention of Prof. J. was limited to a district embracing 
chiefly its northeastern: portion. 
“ Its northern or northwestern border is along a high and thers 
ably uniform and continuous ridge of mountain, lying south of the 
Vol. xxx1x, No. 1.—April-June, 1840. 18 
