* 
Mineralogy and Geology. 
anvil Meneheiny 7 <a ‘nae » Nack, near ¢ Erbesliidesheign the 
The ey occur in ve india the normal beds of the coal 
ate in ‘the Be bap the. Reecdaaids, a the feldspar por- 
phyries ; these massive rocks lying within the range of the carbonifer- 
ous strata. They are also found. disseminated er in fissures in beds 
of sandstone of this formation, as at Miinster- and W: Reerchwsilet, 
= unconnected with true veins. The ation w ie “ihe 0 
ry =e 
sna different oetiion some of which range in straight lines. The 
longest of these lines reaches from Katzenback, over the Stahlberg, 
Landsberg, near Obermoschel, to ie Kellerberg, and-is about fourteen 
(three German) miles in extent. 
/ 7. Notes on. the Mines Gr portion of the State ve Mexico ; by 
Lieut. G. W. Raines, U Dp sie from the American Star, city of Mex- 
the | mines of Mexico; som e point is  seledied i in the vicinity of one or 
mot ns, which indicate sufficient richness of ore, and contiguous-to 
d eer necessaries, and sabig pieyalion allows the water to be. 
pr cipal ij items 0 
From this shaft, peer binet peri are excavated in the direction of 
the v ain of a size la urge enough forthe passage of the.miners with ore ; 
d to the vertical rope, | 
horizontal gallery, or level, has ‘illowed the vein’so far as to make the 
air impure, either a new gallery must be made, or a vertical aperture 
pierced for a proper circulation of the air; in large mines these ventil- 
ating = are numerous and expensive 
The ore having arrived at the surface, is carried to the pounding 
mills, bore by the action of vertical beams of wood ‘shod with iron; ; 
which are raised and let fall by machinery, it is reduced to pow 
the coarser particles being separated by a sieve over hie the p 
falls, are.returned to the mills for further action, he finely divided 
duce a lo 
fi —s ivision: at the works at Sam 
nest possible state = omen 3 at the’ works a ae d od buble 
: trough, of two solid. gylinders of s tie 
mill. 
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