150 



aEOLOGY OF OHIO. 



pits, but it is in some places overlain by coal about thirty inclies in 

 thickness. A specimen obtained from the naine or pit (but whether from 

 the upper or lower bench is not certain) was analyzed by Prof. Wormley, 

 giving the following result : ^^ 



Water 2.00 



Silica 79.90 



Alumina 14.60 



Iron oxide 1.60 



Lime 0.20 



Magnesia 0.24 



Alkalies 1.50 



Total 100.04 



AXTITUDKS IN PORTAGE COUNTY ABOVE LAKE BKIE. 



FT. 



Eavenna Station 630 



Eavenna Town 560 



Eootstown 550 



Atwater Station 560 



Atwater Center 600 



Eailroad Summit 603 



Topographical Summit, north 685 



Cuyahoga Eiver Bridge '474 



GarrettsviUe D6p6t 455 



Mantua 536 



Drakesburgh 635 



Windham 372 



Edinburgh 610 



Campbellsport 410 



Charlestown Center 575 



Limestone Eidge 675 



Freedom Station 575 



