115 Geologicai, Bibliography of Virginia 59 



N 



Nason, F. I<., Origin of the Iron Pyrites Deposits in Louisa 

 County, Virginia. 



Engr. and Min. Jour., vol. Ivii, pp, 414-416, illustrated, 



Newberry, J. S , Reference to Potomac Formation. 

 Bull. Torrey Bot. Club, No. 13, p. 34, 1886. 



Fossil Fishes and Fossil Plants of the Triassic Rocks of 



New Jersey and the"Conne(5licut Valley. 



Mon. U. S. Geol. Surv. , No. 14, xiv & 152 pp., 26 pis., 

 1888. 



Virginia mentioned throughout preface. For fossils from Vir- 

 ginia, see especially pp. xi, 4, 10-12, 20, 22, 62, 63, 84. 



Newberry, S. B., (See under Day, D. T., and Rothwell, R. 



P.). 



Newell, F". H., Richmond Coal Field, Virginia. 



Geol. Mag., decade iii, vol. vi, pp. 138-139, 1889. 

 Review of W. Clifford's work. 



Nicolls, Wm. T., The Story of American Coals, 

 lyippincott Co., Philadelphia, 1897, 405 pp. 



For Virginia: Mines first opened, p. 53; Richmond coal field, p. 

 83; Coal production of, p. 115; Domestic uses, gas coal for Phila- 

 delphia, p. 364. 



Nit^e, H. B. C, Notes on Some of the Magnetites of South- 

 western Virginia and the Contiguous Territory of North 

 Carolina. 



Trans. Amer. Inst. Min. Engrs., vol. xx, pp. 174-188, 

 1892. 



Discussion by E. C. Pechin, pp. 185-188. 



Nuttall, Thos., Observations on the Geological Strudlure of 

 the Valley of the Mississippi. 



Jour. Acad. Nat. Sci. Phila., vol. ii, pt. i, pp. 14-52, 

 plate, 1 82 1. 



For Virginia, see pp, 35-36. 



Page, C. C, Amazon Stone from Amelia County, Virginia. 

 The Virginias, vol. vi, pp. 24-25, 1885. 



