First, or Southern Coal Field of Pennsylvania. 373 
It would appear from these results, that the bituminous quali- 
ties of the coal increase with considerable regularity from Tama- 
qua to Rattling Run, that from Mauch Chunk being an excep- 
tion, although its excess of volatile matter may probably be at- 
tributed to its containing a larger proportion of water. 
Specimens of two other American coals, were examined for 
comparison with the preceding. These were from the Blossburg 
or Tioga mines, and from Cumberland, Md. 
No. 13. Tioga.—The Tioga Coal Field is a detached portion 
of the eastern extremity of the Great Allegany Coal Basin. The 
specimen examined was of a medium hardness, and its fractures 
were sometimes brilliant, sometimes altogether devoid of lustre. 
Its ash was cream-colored, inclining to grey. | 
No. 14. Cumberland, Md.—This coal is brilliant, with an 
even fracture, and cream-colored ash, passing to grey. 
No. 15. Black Spring Gap. Grey Vein.—This remarkable 
vein, as mentioned by R. C. Taylor, Esq. in his “ Report of the 
Stony Creek Coal Estate,” is about seventeen feet thick, contain- 
ing much fine coal, with a vein near the centre, two or three feet 
thick, of coal of a greyish color, which has given the name to the 
Whole. The specimen of this included vein, in my possession, 
closely resembles plumbago in appearance. It burns with little 
flame, leaving a yellowish red ash. 
Table of analyses of coals from Pennsylvania. The numbers re- 
Jer to those prefixed to the paragraphs. 
No. Locality. Carbon. Volatile matter. | Ash. 
NYS Ne RRRR NR BIOs. 098.. -.08T 
__ Another analysis of the same gave, .869 .075 .056 
BePaaquyy:::: Gescsert eon SE GIO 085. 035 
8. Pottsville, seitarunde sit code B84 -< 068° 048 
Mewineprove, | s test a= oes i 969° | 1072 069 
5. Black Spring Gap. Fish-back vein, .840 .065 095 
6. Black Spring Gap. Peacock vein, .886 071 .043 
’. Gold Mine Gap. Peacock vein, 830 .090  .080 
8. Rausch Gap. Pitch vein, west side, .771 109 —_.120 
9, Rausch Gap. Pitch vein, east side, .789 .110 101 
ee Yellow Springs Gap. Back-bone vein, .775 110 115 
] 
- Yellow Springs Gap. Vein next N. : TAT 148 105 
of Central Ridge, 
Rattling Run Gap, - > em 761 169 .070 
ol. x1, No. 2.—Jan.-March, 1841. 48 
=< 
