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3 
On Spirally dotted Ducts in Anthracite Coal. 07 
had been fished up and the animal eaten over night. But al- 
though Unio collinus was common among them, and the water 
was shallow, I was unable to find the living specimens whose 
haunts seem to be so well known to the Naiad-loving quadruped. 
Between the different mountain spurs in this wild region, there 
are beautiful valleys with, level and fertile land. The mountains 
are quite steep and composed of non-fossiliferous rocks of the 
carboniferous system, but coal does not occur. Iron ore is €X- 
cellent and abundant, and within a short distance of Mr. New- 
kirk’s furnace. The climate here is about the same as that of 
‘the latitude of Philadelphia, the elevation of the land being 
equivalent to the difference of latitude. But in these wooded and 
mountain regions the sudden fall of temperature at night, is 
often very great, particularly after rain, and therefore ill suited to 
an invalid’s constitution. 
The shells of Calf Pasture river are comprised in the following 
list :— 
_Bivalves. : Anodon cataracta, Say. 
Unio collinus, Con. A. marginata? Say. 
U. purpureus, Say.  Univalves. 
__U. constrictus, Con. Planorbis parvus, Say. 
*  U. subplanus, Con. Ancylus rivularis, Say. 
U. lanceolatus, Lea.  Paludina decisa, Say. 
Alasmodon undulata Say. Anculosa dilatata, Con. 
- A. marginata, Say. Melania virginica, Say. 
Ant. X.—On the detection of Spirally dotted, or Scalariform 
Duets, and other vegetable tissues in Anthracite Coal; by 
Prof. J. W. Bamey, of the U. 8. Military Academy. 
On perusing in this Journal (p. 124, present volume ) an account 
of the results obtained by Schultz and Ehrenberg in the mi- 
croscopic examination of coal decarbonized by means of nitric 
acid and heat, I felt a desire to repeat the experiments and obtain 
if possible some of those ‘“ white splinters” which they found 
“composed of aggregated siliceous cells arranged in regular suc- 
cession, of the structure of the prosenchymatous cells of wood.” 
But just as I was about to commence the repetition of these ex- 
periments, it occurred to me that I might find the decarboniza- 
tion in every stage of progress, among the masses of some par- 
