137 Geological Bibliography of Virginia 71 



Proc. Amer. Phil. Soc, vol. iii, p. 88. 



Amer. Jour. Sci., vol. xxxviii, pp. 182-184, 1840. 



Geology of the Virginias, 1884, pp. 659-673, pis. 1-5. 



These descriptions were published in connexion with other "Con- 

 tributions to the Geology of the Tertiary Formations of Virginia," 

 1835, 1837 and 1839, identical with pp. 29-39, Ann'l Rep't, 1835, and 

 pp. 419-437, Ann'l Rep't, 1840. 



On the Physical Struaiire of the Appalachian Chain, as 



Exemplifying the Laws Which Have Regulated the Ele- 

 vation of Great Mountain Chains generally. 



Trans. Assoc. Amer. Geol. and Nat., 1840-42, pp. 474- 

 531, pis. 3, 4, 5. 



Geology of the Virginias, 1884, p. 601. 



Rogers, W. B., & Hotchkiss, Jed., Map of Virginia, by 

 Jed. Hotchkiss. The Geology by Prof. W. B. Rogers, 

 chiefly from the State Survey, 1835-41, "with Later Ob- 

 servations in Some Parts." Accompanying "Virginia: 

 a Geographical and Political Summary, etc., ' p. 46. 



Richmond, 1876. 



This Map, with some Additions, also Appeared with 

 the Title, ' ' Hotchkiss' Geological Map of Virginia and 

 West Virginia. The Geology by Prof. W. B. Rogers, 

 chiefly from the Virginia State Survey, 1835-41, with 

 Later Observations in Some Parts." Scale, 1:1,520,640, 

 or 24 miles to i inch. Accompanying "Preliminary Re- 

 port Concerning the Resources of the Country Adjacent 

 to the Line of the Proposed Richmond & Southwestern 

 Railway," by N. S. Shaler, Cambridge, 1880, and also in 

 The Virginias, vol. i. p. 92, Staunton, Va., 1880. 

 Rolker, Chas. M., The ProduAion of Tin in Various Parts 

 of the World. 



i6th Ann'l Rep't U. S. Geol. Surv., pt. iii, pp. 458-538- 

 sedlions and figures, 1894-95. 



Rothwell, R. P., (See under Day, D. T.). 



The Mineral Industry: Its Statistics, Technology and 



Trade in the United States and Other Countries from the 

 Earliest Times to the End of 1893. In Two Volumes. 

 Edited by R. P. Rothwell, Editor of the Engineering 

 and Mining Journal. 



New York, Scientific Publishing Co., 1893-94. 

 Vol. I. xxiii & 628 pp. 1892. 



