Notice on Vegetable Fossils. 271 
In the first of the above named places, four or five stalks 
irom twenty to 30 centimetres (about eight or twelve inches) 
in diameter, which Mr. d’Aubuisson calls trunks of trees, 
are seen standing i in a vertical position in the micaceous 
sand stone (psammite) of the coal ground. All the accompa- 
nying circumstances are similar to those which attend the 
vertical stalks of St. Etienne.* 
Similar facts have been observed in the environs of Saar- 
bruck, in several coai mines, particularly in that of Rohwald, 
where the trunks measured two metres (six and a half feet) 
in height, and six to eight decimetres (two feet to two feet 
seven inches) in diameter, and in the mine of Wellesweiler : 
the trunks, found in the latter mine, remarkable for their 
conic form, for their diameter from forty-five to thirty-six 
centimeters (seventeen and three fourths to fourteen and a 
quarter inches) and for their length which exceeded three 
metres (ten feet) have been lately described, and elucidated 
by plates, by Dr. Noggerath.t 
These trunks, which cannot be classed with any known 
vegetable, and which appeared to differ from those observ- 
ed at Hainchen and at St. Etienne, traversed several layers 
of psammite, as well sandy as schistose, and were situated 
between two beds of coal. 
Mr. de Charpentier cites a similar instance which he ob- 
served in the psammite coal-ground situated north-west of 
Waldenburgh, in Lower Silesia. He says that in 1807 there 
was discovered in that mine a fossil tree, in a vertical posi- 
‘tion, traversing several strata, and having the forms of its 
roots and of some of its branchesin a good state of preserva- 
tion, while their nature was changed to a fine grained 
quartz of a greyish black, but the structure was not recogn- 
zable: the bark and the small branches were changed to 
coal. This trunk was four decimetres (fifteen and three 
quarter inches) in diameter, and there remained of its length 
about four metres MIeE feet.){ The presence of the 
* See Journal des Mines, V. KXVII. page 43, and more especially 
dW AUBUISSON, Géognoste Wis 2, Pacoz. 
+ Ueber aufrecht in gebirgsgesiein ingeschloffene fossil Rouen &o, 
yon Dr. Jacon NoGGERATH. Bonn, 1819 
+ Bibliotheque Universelle, 1818. V. 1X. p. 256. 
