372 First, or Southern Coal Field of Pennsylvania. 



No. 4. Pinegrove. — A specimen of this coal, from the " North 

 Seam," three fourths of a mile north of Sharp Mountain, was sub- 

 mitted to examination. It was brilliant, exhibited a conchoidal 

 fracture, and was refractory under the hammer. Ash reddish yel- 

 low. 



No. 5. Black Spring Gap, 26 miles from the Susquehanna. 

 Fish-back Vein. — This is the next western point at which coal 

 is worked, and from it, specimens of two veins were examined, 

 this and the following. This one is devoid of lustre, and after 

 burning, leaves a yellowish red ash. 



No. 6. Black Spring Gap. Peacock Vein. — The coal from 

 this vein was brilliant, with a conchoidal fracture, and leaves a 

 yellowish red, very light ash. 



No. 7. Gold Mine Gap, 25 miles from the Susquehanna. 

 Peacock Vein. — This coal is brilliant, possessing a conchoidal 

 fracture. Its ash was yellowish red, very bulky and light. 



No. 8. Rausch Gap, 21 miles from the Susquehanna. Pitch 

 Vein, west side. — The specimen from this vein was rather friable. 

 Its fracture was somewhat conchoidal, and generally brilliant. 

 Ash yellowish red. 



No. 9. Rausch Gap. Pitch Vein, east side. — This coal is hard 

 and rather brilliant, leaving a deep red ash, which changes to yel- 

 lowish brown by a day's exposure to the air. 



It will be seen that the portions of volatile matter in the two 

 last are very nearly equal. The difference in the hardness and 

 in the ash, probably results from the one specimen having been 

 taken from nearer the crop than the other. 



No. 10. Yellow Springs Gap, 16 miles from the Susquehan- 

 na. Back-bone Vein. — This specimen possessed but little lustre 

 and left a dark red ash. 



No. 11. Yellow Springs Gap. Vein next north of Central 

 Ridge. — This is a dense, black coal, which cokes. Its ash is pale 

 salmon color. 



No. 12. Rattling Run Gap, 13 miles from the Susquehanna. 

 Perseverance Vein. — The specimen analyzed was brilliant, with 

 a clear, bright fracture, and burned with a bright flame. Its ash 

 was dark red. 



This terminates our series, being the last important coal station 

 where a vein fit for working has been discovered, so far as explo- 

 ration has gone on. 



