68 Btjlletix 7 124 



Natural Ice Houses in A'irginia. 



Proc. Boston Soc. Xat. Hist., vol. vii. pp. S4-S5, 1859- 

 61. 



On the Group of Rocks Constituting the Base of the 



Palaeozoic Series in the United States. 



Proc. Boston Soc. Xat. Hist., vol. vii, pp. 394, 395, i860. 



Geological Map of \'irginia on the Basis of Hotchkiss" 



New Topographical Map. 



'See Hotchkiss' Summarv. 1874'!. 



On the Gravel and Cobble-stone Deposits of Virginia 



and the Middle States. 



Proc. Boston Soc. Xat. Hist., vol. xviii, pp. 101-106, 

 1S75-76. _ 



The Virginias, vol. iii. pp. 5S-59. 1S82. 



Geolog}' of the Virginias. 1SS4, p. 709. 



{Abst.) Amer. Jour. Sci.. 3dser.. vol. xi. pp. 60-61, 1S76. 



Xotes from McFarlane's Geological Railway Guide, 1879. 



i^List of the Geological Formations Found in Virginia 

 and West Virginia). 



Geology- of the Virginias, 1884. p. 717. 



New York, D. Appleton & Co., 1879. 



Hotchkiss' Geological Map of Mrginia and West Vir- 

 ginia. The Geology by Prof. W. B. Rogers, chiefly from 

 the State Sur^-ey, 1835-41, with Later Obser^-ations in 

 Some Parts. Scale, 1:1.520.640, or 24 miles to i inch. 

 Accompanying ' ' Preliminary Report Concerning the Re- 

 sources of the Country Adjacent to the Line of the Pro- 

 posed Richmond &; Southwestern Railway," by X. S. 

 Shaler. 



Cambridge, 1880. 



The Same Map as above. Accompanying ' ' The \'ir- 



ginias," Vol. I, No. 6, p. 62. 



Staunton, 1S80. 



The Geological Formations Found in A'irginia and West 



\'irginia. Table of the Geological Formations Found in 

 \'irginia and West Virginia. 



The Virginias, vol. i, pp. 13-14, 1880. 



The Iron Ores of Virginia and West Virginia. 



The Virginias, vol. i, pp. 128-130, 138-140, 152-153, 

 160-161, 170-171, 174-175, 182-183, 186-188, 1880. 



