HOCKING VALLEY COAL FIELD. 961 
By comparing this section with Fig. XCVII, it will be seen that 
the same state of things is found here that has been already described 
in the New York mines of Shawnee. A layer of shale, 12 inches thick, 
is found between the normal and the supplemental seams. In Fig. 
CIV the same parting is seen, but only one inch in thickness. Going 
northward, the upper coal is rapidly reduced, and will very soon 
entirely disappear. The seam is mined by G. Martzloff, on Section 2, 
Monday Creek township, about 1 mile north of the Furnace mine. At 
this point it has the structure shown below: 
FLEVRE CY in 
SECTION FROMwJ.MARTZ LOFFS FARM 
State o Shale. === 
But little beside the normal seam is worked in the furnace mine. 
The roof coal, to the extent of one or two feet, is not taken down, and 
at the outside not more than 18 or 20 inches of the supplemental seam 
is found available for furnace use. 
This body of coal has a historic interest from the fact that it was 
the first of the Hocking Valley to be applied to iron manufacture. The 
successful manufacture of iron from the native ‘‘ limestone (or Baird): 
ore” with this coal as the sole fuel, which was begun here in 1874, by 
Mr. Samuel Baird, now deceased, is one of the important points in the 
- development of this field. The great seam was proved to be one of the 
few bituminous coals of the country that can be successfully used in its 
natural state in iron manufacture, and since that time the development 
of this important interest has been very rapid. There are 13 furnace 
stacks now in the field that make the Hocking Valley coal their sole 
reliance for fuel. 
61. G. 
