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243. Orton, Edward: Clinton in Clark County. Geology of Ohio, Vol. I, pp. 



463-464. 1873. 



244. : Clinton Limestone in Green County. Geology of Ohio. Vol. II, 



pp. 662-6G7. 1874. 



245. : Clinton Limestone in Warren County. Geology of Ohio, Vol. 



Ill, pp. 3S4-.3S6. 1878. 



24G. : Clinton Limestone as a Source of Oil and Gas. Ohio Geol. Surv. 



Kept, pp. 227-247. 1890. 



247. : Fossils of the Clinton limestone [in Southern Ohio]. Geology 



of Ohio, Vol. Ill, pp. 41.5-410. 1878. 



248. : Gas in the Clinton limestone at Lancaster. Geology of Ohio, 



Vol. VI, pp. 783-784. 1888. 



249. : Lime Production. Geology of Ohio, Vol. VI, p. 705. 1888. 



J250. : Clinton Limestone in Ohio. Geology of Ohio. Vol. VI, pp. 11-13. 



1888. 



251. : Geology of Ohio, Vol. VII, pp. 10-11. 1890. 



252. : Clinton Group in Geological Series in Ohio. Prelim. Rept. on 



Petroleum and Gas. Ohio Geol. Surv. Rept., pp. 20-21, 66-68. 1886. 



253. Orton, Ed., Jr., and Peppel, S. V. : The Composition of the Limestones 



of Ohio, etc. Ohio Geol. Surv. Bull. 4, pp. :«, 143-147. 1906. 

 :254. Owen, David D. : Clinton Iron Ore. Ky. Geol. Surv. Rept., pp. 1.30-131. 

 1856-1857. 



255. Peckin, E. C. : Iron Making at P.irmingham, Alabama. Eng. and Mng. 



Jour., Vol. LVIII, pp. 6, 29, .52. 1894. 



256. : Idem. Eng. and Mng. Jour.. Vol. LVII. p. 006. 1894. 



257. : The Iron Ores of Virginia and Their Development. .\m. Inst. 



Mng. Engrs. Trans., Vol. XIX, pp. 1022-1025. 1S90-1S91. 



258. : Idem. Author's edition from the Proc. of the Iron and Steel 



Inst., pp. 6-8. Oct., 1890. Clinton No. V, analyses. 



259. Peppel, S. V.. Orton, Ed.. Jr.. and. See Orton, Ed.. Jr. (253). 



260. Peter, A. M. : Report on P.ath and Fleming Counties. Ky. Geol. Surv., 



p. 19. 1884. Analyses of Clinton ores of Ky. 



261. Phalen, W. C. : Origin and Occurrence of Certain Iron Ores of North- 



eastern Kentucky. Econ. Geol., Vol. I, pp. 660-673. 1906. 



262. Phillips, Wm. B. : A List of Minerals Containing at Least One per Cent 



of Phosphoric Acid. Am. Inst. Mng. Engrs. Trans., Vol. XXI, p. 189. 

 1892-1893. 



263. : The Magnetic Separation of Non-magnetic Material. Am. Inst. 



Mng. Engrs. Trans.. Vol. XXYT. pp. 1089-1095. 1896. 



264. : Notes on the Magnetization and Concentration of Iron Ore. 



Am. Inst. Mng. Engrs. Trans., Vol. XXV, pp. 353-370. 1895. 



265. : Manufacture of Basic Iron in Alabamn. Min. Iiid.. Vol. V. jtp. 



35.3-370. 1896. 



266. : Iron Making in .Vlabama. Ala. Geol. Surv., 1st Ed. 1896. 



267. : Idem, 2nd Ed. 1908. 



268. : Idcvi, 3rd Ed. 1912. 



269. : Idem, Am. Mfg. and Iron World, pp. 22.5-226. Aug.. 1896. 



270. : A Great Southern Iron Ore Reserve. Mfg. Ree. Feb. 4. 1909. 



