422 GEOLOGY OF OHIO. 
coal and but little carbonaceous matter in the seam, nor does it agree 
in appearance with the clay-bands of the Upper Freeport horizon. It 
consists mainly of gray carbonate of iron, interleaved with gray shale. 
The ore has excellent volume, reaching in the drifts a maximum thick- 
ness of 6 feet, and holding a thickness of 4 to 5 feet over considerable 
territory. Almost all that is now obtained is mined in regularly opened 
drifts. The chief center of its present production is at and about 
Webster, Bloom township. All of the ore from this field is taken by 
the Jackson and Wellston furnaces. The large and continued use of it 
at these points guarantees at least a fair quality to the ore. 
This quality is further shown by the following partial analysis of 
the ore, furnished by Issaac Brown, Esq., President of Star Furnace 
Company, Jackson: 
Metallic if Ont ica secsdancsonss sone sebsee vcnee es eeee en enue cee Soe eee 34,7 
Silica and ‘alumina ctaccosgcacesecss esucuessnsoweeweeeuemon eet seee ea eeeaes 22.4 
Sulphur ...... sab So wele- sau sin boos dea Slows be Seah b Sead nakdes secs Sartunac sloc teers sem ener 0.231 
PHOS PH OPUS): .fiscaa ves acasenn desea sees Goeeres oe eee eee) Cee oe ee eee 0 557 
IMOIStULC w.scccuat cess stees sevseeted saseneuescarneeceneconsestece mameeemeen eeeomeetrss 4.6 
Mr. Brown further states that the ore contains 3 per cent. of lime, 
that it loses 24 per cent. in calcination, and that the calcined ore yields 
in the furnace, in actual work, 48 per cent. of iron, which is a little 
better than the analysis above given indicates. He adds that the iron 
made from the Boggs ore is a strong, dark-colored, open-grained foundry 
iron of excellent quality. The only faults of the ore are its leanness, 
and the fact that it cannot be worked by itself. 
In Vernon township it is thinner than in Bloom, but it still over- 
measures the other accessible seams, with the exception of the Franklin 
block. It has long been mined by Howard Furnace as the flag ore. 
At Clinton Furnace, it is apparently replaced by a sandy limestone. 
Promising outcrops of the seam are known in Hamilton township, 
Jackson county, and the so-called limestone ore of Richland Furnace 
is probably to be referred to this horizon. 
A considerable supply of ore for many years to come, is to be 
expected from the Boggs seam. ‘The two or three square miles at the 
center of Bloom township that contain it would of themselves warrant 
such a statement. 
Its place in the scale is easily remembered. It lies about 40 feet 
