616 GEOLOGY OF OHIO. 
in their composition; but the courses in question are almost the ‘oni y 
ones that attain this percentage. Their chemical relations are rather 
with the beds below them, than with those above. 
No. 1. 
Canbonatecofolime cece 2s 22S Boe aie ee Ney rn teeta pataese eye Sete ace ara 55.09 
Carbonate of maonesian: Saiee sce cele cacy ie ee ate peepee cea aes aera 41.07 
CRAM SOL TOM es eee Ne CAA epee a ees ere ee 63 
Sil/clousnmatte Geese eases ieee eee PSR aes Bescon ese reais are pin 1.96 
Organicimavterssccesec es woe sacs ciel Sees sels cae aeetae ee eee tessa eae seren 92 
- 99.67 
Analysis No. 2 appertains to the same horizon. The specimen wa 
obtained from the quarries of the Roberts Bros., Jefferson township, Madi. 
son county. (Bank of Little Darby Creek.) 
No. 2. 
Carbonate of slimey oo he Wei Oe rae aes Pee aye ae crepe care ei otetenar oe Seta OA Go () 
Carbonatesolumacnesianaestees =o sca cree eset ee eee pineee ee eee more 4 
AT TTT ATV AVON eee cee eee ON SEZ ree ee enya oe OUR a Pn ee .00 
Msoluble Matter sors SPs Ma Oe I ea eee ry gn Saar ear 1.10 
99.74 
Analysis No. 8 is of the rock that lies at the base of the Corniferous 
limestone, at Bellefontaine. (Stevenson’s quarries.) 
No. 3. 
Carbonate t flim ssa oe esc rael cere say ake are eer aterororonst otete ey Te oa Toe nS aE are ee GTAG 
Carbonateormagnesiaececscan esses semcermeiscciscicsen seme epee reer crete me G 
AIM DITA ATT TOT eae eer AC ahs CoE | UA mp ei tr nee Non cae 20 
Insoluble matter....---. Laod Sood Ode Gn00 cocdonscoace coda ccsedoosseodes | ae 
99.23 
For comparison the analysis of the Lower Corniferous, from Pauldin z 
county, isappended. Thestone here is very different in appearance from: 
any other in the series, being non-fossiliferous and quite fine and even 
grained. The specimen analyzed is from Clark’s quarries, Charloe. 
No. 4. 
GCarbonaterote liner ics o Meee soe eA a INE WED Eee ah sev ee pee eee emmy 7a) 
Carbonate tof magnesia ..2o..2 ose tds See See ee ree eee eee ee eee OM 
Alumina,and drome soe. ice ee cee oe emcee je water aneted eee eee re teve mR. 6) 
Silicious Matber coe eos sites ee eiopeine ai aeiectcoera = ene eee ee ieennere at POL SO 
Orcanichmatte ner yee ee eee oleae eleehe seater tere totals aietateteteetetetetetene tater .88 
99.41 
Nos. 5 and 6 are from the quarries of Smith and Price. The first ot 
these represents quite favorably, the general composition of the most 
valuable stone of the quarry—viz., the cutting stone, while No. 4 shows 
