884 GEOLOGY OF OHIO. 
I am the more willing to delay the publication because I hope wichin the coming year © 
to complete the examination of this part of the series. 
In conclusion, I wish to express my obligation to the persons named below for import- 
ant aid in accomplishing my work. I am greatly indebted to John Campbell, Esq, © 
of Ironton, the veteran iron-master of the Hanging Rock region, who has avery wide and 
thorough knowledge of the southern portion of the field; to Hon. Elias Nigh and to 
John Peters, Esq., also of Ironton; to Col. W. M. Bolles, of Portsmouth; to Geo. E. 
Williams, manager of Scioto Furnace; to W. H. Sloan, manager of Monroe Furnace ; 
to J. Ay Turley, manager of Washington Furnace; to Hon. Jos. Stafford, late mana- 
ger of Gallia Furnace; to Capt. Lewis Davis, of Jackson C. H.; to Hon. Andrew 
Roy, late State Inspector of Mines, now of Wellston; to Dr. D. V. Rannels, of 
McArthur; to Jchn W. Jones, of Haydenville; to Gen. Samuel Thomas, George W. 
Gill, and W. H. Jennings, of Columbus. There are two other persons whom I 
wish to mention here with particular honor, viz., Dr. L. W. Baker, of Hamden 
Junction, acd Samuel Baird, Esq., of the Hocking Valley—both of whom have 
died within the past year. Mr. Baird possessed a better knowledge of the Hanging Rock 
district, as a whole, than any other man that I have found in it, having been connected 
with furnace interests in every county between the Hocking Valleyand the Ohio River. I 
am indebted to him for much valuable assistance and information. 
Dr. Baker had studied most thoroughly and successfully the stratigraphical geology 
of his own region, and had communicated to me many of his facts and measurements. 
I have made free use of his sections, and desire here to express my great indebtedness to 
him. Jf he had lived a year or two longer, he would have embodied his observations in 
a report which would have gone far to settle the disputed or doubtful points in the 
geology of the interesting region in which he worked. 
The assistance that I have received in the prosecution of this work from several of the 
students in the Ohio State University is important enough to be publicly recognized. 
Messrs. R. 8. Towne, of Portsmouth, and Thomas Kelly, of Vinton Furnace, have done 
excellent field work in their respective counties, and I am indebted to Messrs. C. H. 
Dietrich, J. S. Humphrey, C. N. Brown, H. D. Gregory, and J. C. Atkinson, for carefully 
measured sections in various portions of the field. } 
To the labors of the geologists that have preceded me in this field, and especially to 
the reports of Prof. Andrews, I owe very much—more, I am sure, that I can definitely 
acknowledge. Itis not alone for the recorded facts that Iam indebted, but the awakening 
of interest, the impetus to intelligent exploration, and the diffusion of geological knowl- 
edge, that have resulted from the previous publications of the survey, have rendered all 
subsequent work much easier and more advantageous in many ways. I have made the 
- freest possible use of the work of Prof. Andrews, and here express my great indebtedness toit. 
When all these acknowldgements are made, I find very little in my report that 
deserves to be called original. My labor has largely consisted in putting together, in 
proper order, facts already held by various individuals. Both the field work and the 
preparation of my notes for publication have been accomplished in the intervais of my 
college engagements, and they bear witness to the fragmentary way in which they were, 
of necessity, undertaken. Minor errors of indentification and of stratigraphical order, 
will no doubt be found in this report, but I am sure that in it the true arrangement of 
the most important geological elements of the Hanging Rock district finds clear ex- 
pression. , 
Very respectfully yours, 
EDWARD ORTON. 
OHIO STATE UNIVERSITY, August 1, 1878. 
