56 



The Geological Survey of Missouri. Amer. Nat., ix, pp. 240-245. 

 Remarks on Hematite Iron Ores, Ea8tern United States. I. M. E., iii, 



pp. 41 7-422. 

 On the Boston Artesian Well and Its Waters. Boston Soc. Nat. His. 



Proc , xvii, pp. 486-488. 

 Remarks on the Relations of Primordial and Crystalline Works in 



New England and Elsewhere. Boston Soc. Nat. His. Proc., xvii, 



pp. 508-510. 



1876. 



The Cornwall Iron Mine and Some Related Deposits in Pennsylvania. 



I. M. E., iv, pp. 319-325. 



History of Crystalline and Stratified Rocks. P. A. A., xxv, p. 205. 

 Geology of Eastern Pennsylvania. P. A. A., xxv, pp. 208-212. 

 On the Petrosilex Porphyrus of N. Carolina. P. A. A., xxv. Read, 



not printed. 



A New Ore of Copper and Its Metallurgy. I. M. E., pp. 325-328. 

 The Development of Our Mineral Resources. Being the Fifth Paper of 



the First Contrib. of the Repub. Series. Harper's Magazine. 



1877. 



The Goderich Salt Region. I. M. E.. v, pp. 538-560; S. J., third 



series, xiii, p. 231. 



older Rocks of Western North America. 

 J. D. Dana on the Alteration of Rocks. Boston Soc. Nat. His., xviii, 



pp. 108, 109. 

 The Decayed Gneiss of the Hoosnr Mountain. Boston Soc. Nat. His. ; 



xviii, pp. 106-108. 



1878. 



International Geological Congress. P. A. A., xv, p. 485. 



Special Report on the Trap Dikes and Azoic Rocks of Southern Penn- 

 sylvania. Part I. Historical Introduction. II. Geol. Surv. Penna. 

 Report E, p. 8-21 ; 253 pages. Harrisburg. 



On the Geology of the Eozaic Rocks of North America. Boston Soc. 

 Nat. His., xix, pp. 275-279. 



The Quebec Group in Geology. Boston Soc. Nat. His., xix, pp. 2-4. 



Introductory Remark at Phil. Meeting. I. M. E., vi, p. 18. 



Remark on Nickel Deposit of Oxford, Canada. I. M. E., vi, p. 213. 



Remarks on Origin of Clays. S. M. K.. vi. p. 188. 



On the Origin of Crystalline Rocks. B. A. R., p. 536. 



On the Geological Relations of the Atmosphere. B. A. R., p. 544. 



1879. 



Coal and Iron of the Hocking Valley, O. I. M. E., vii, p. 313. 

 The History of Some Precambrian Rocks in America and Europe. P. 

 A. A., xxvii, p. 279 ; S. J., xix, pp. 268-283 ; C. N.. ix, p. 257. 



