218 Scientific Intelligence. 
IL GroLtocy anp NaturAL History. 
1. Geological Survey of Ohio. Report of Progress in 1810.— 
The notice of this Report, commenced on page 143, is here con- 
tinued. 
Prof. Edward Orton reports on the geology of Highland Co. 
The rocks of this county range from the upper beds of the Cur 
rf: 
Charles Dalyrymple. The pebbles that compose the conglomerate 
cks. The conglomerate is also fossiliferous, well-worn forms © 
with it. The fossils 
geology of the Mississippi valley, proofs have been accum 
that a Silurian island stretched hae, from Nashvils 
toward and beyond Cincinnati, Highland county furnishes gies 
quota of facts as to the existence and as to certain of the 
