620 PROCEEDINGS OF SCIENTIFIC SOCIETIES. 
sands ee outcropping at different oe had been mistaken for 
two different beds, to one of which the name of Anvil Rock was given 
at one eano while at the other it was SO Mahoning Sandstone, 
and in this way their section was increased in thickness about three 
hundred feet or more beyond what g sra should be, and the number 
of workable coal-seams nearly doub 
This view of the case is aca wre by the fact also of a general 
correspondence ce between the upper portions of the two sections, both 
tor 
of vas recognized ie — r Meek as common in the upper coal- 
measures of Kanzas, and as the equivalent of beds to which the term 
** Permo-carboniferous” Was pepa z himself and Dr. Hayden in their 
paper on the rocks of Eastern Kansa 
ain, by placing these aa t ona parallel, and giving & down- 
ward section for three hundred feet as given in the Kentucky section, 
and we have an almost equal repetition of beds. 
If we take the Kentucky section as published, and place these sand- 
between it and the lower bed. This gives a general correspondence 
between the. Illinois and Kentucky sections, such as might be expected 
ar in different portions of the same coal-field 
“On the Lower Silurian Drowa Hematite Beds of America.” By 
region. At three or four 
exposures the solid ore-bed is, to be, seen; pa the others only loose 
lumps of ore mixed with 
The other American brown keune deposits of the same age, Te- 
semble these so closely as to leave the impression that where only 
2i blocks of sandstone near the outcrop of a sandstone bed, Of to 
the coal-dirt of a coal ee. or to gold or tin alluvial deposits, 
aracteristic 
making allowance of rse in the comparison for the ch 
