884 GEOLOGY or OHIO. 



•I<am the mure willing to delay the publication because I hope within the coining year 

 to complete the exnmination of this part of the series. 



In ooncln&ioD, I Tvish to express my obligation to the persons named below for import- 

 ant aid in accomplishing my work. I am greatly indebted to John Campbell, £sq., 

 of Ironton, the veteran iron-master of the Hanging Eock region, who has a very 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. A. Turley, manager of Washington Furnace; to Hon. Jos. Stafford, late mana- 

 ger of Gallia Furnace ; to Capt. Lewis Davis, of Jackson C. 11. ; to Hon. Andrew 

 Koy, late State Inspector of Mines, now of Wellston ; to Dr. D. V. Eannels, of 

 McArttiur; to John W. Jones, of Ilaydenville ; 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, aijd 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 Eock 

 district, as a whole, than any other man that I have found in it, having been connected 

 with furnace interests in every county bdtween the Hocking Valley and the Ohio Elver. 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 colnmunicated 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. E. S. 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, fi>r 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. It is not alone for the recorded facts that I am 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 

 )(&eest possible use of the work of Prof. Andrews, and here expressmy great indebtedness to i t. 

 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 intervals 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. Eock district finds clear ex- 

 pression. 



Very respectfully yours, 



Edward Orton. 

 Ohio State Ukivkesity, Auguet 1, 1878. 



