FRANKLIN COUNTY. 6ll | 
The description now given applies to the stratum, as shown in the 
quarry, under discussion. The stratum extends through the formation, 
wherever shown in Franklin county, but it is only in a limited area, 
even in this quarry, that it presents all of these points of interest. Else- 
where scarcely a single square foot can be found which does not contain 
some fragment of a tooth or plate; but here these elements make up the 
substance of the bed. Several chemical analyses have been made up of 
this layer. Two, executed at the Ohio Agricultural and Mechanical Col- 
lege, by Mr. C. C. Howard, gave the following results: 
No. 1. 
LETHE FOLOGETO NEUE GLE MNNE Co 646565 Goods 6600 600500 DdGQG0 009556 GEuD Code 16.80 
COMOOMANKS OM ITNT c56q6 c40868 eSoRs Se0e aded cong done Hada duce soSb50Cea0 - 73.24 
Cert OOMATe OF MESON co566 conco0od08 b6bb00 665600 660500 506506 FObOG5 Ac 4.97 
ODAC Oi TO ag secu sdsuiso pUbSoHOSO COU BDO OCOECGSEG0 CUDO SOOO SOROOTO eos 2.46 
SVUVICLOWIS WEOPE s coade cad H65000 Cog9S00 660000 099 5005 0000 Joeo00 Ciba Sante 2.14 
99.61 
No. 2 
Triple phosphate Ofelim emer ae bdo CdS HS4 BHOO OSS6 HONS ba SSDObH HdOb Se 18.32 
These specimens are exceptionally rich in phosphate of lime, and can 
not be taken to represent fairly the composition of the whole bed to 
which they belong. 
An analysis is reported to have been made by Prof. H. B. Cornwall, of 
Princeton, New Jersey, which indicated as much as five per cent. of phos- 
phate of lime for the body of the rock. If continuous deposits should 
hereafter be discovered, that would average as well as many samples now 
_ found, they could be turned to economical advantage for fertilizers. 
The bone bed can be traced from the State quarries, the southernmost 
point at which its horizon is exposed, to the north line of the county, 
being easily recognizable in every section in which its presence is due. 
The identification of most of these exposures was first made by Mr. W. 
Farrar, a student of geology in the Ohio Agricultural and Mechanical 
College. i . 
The discussion of its origin and history will be reserved for a subse- 
quent page in the report. 
It will be remembered that the bone bed makes the boundary between 
the Delaware and the Columbus divisions of the Corniferous limestone. 
Immediately above it, in Smith and Price’s quarries, three feet of very 
thin bedded, shaly limestones are found. The same formation can be 
traced along the water-courses that descend to the river here, until 
twenty feet, at least, is added to the quarry section. The Delaware beds 
here have but little in common with the same division on the northern 
