1893. ] NEW YORK ACADEMY OF SCIENCES 177 
“«The New Oil Field of Colorado and Its Bearing on the Question of 
the Genesis of Petroleum.”—Trans. N. Y. Acad. Sci., Vol. VIII. (1888), 
. 25. 
. ‘““The Oil Fields of Colorado.’”—School of Mines Quarterly, Vol. X. 
(January 1888), p. 97. 
‘“«The Pavements of New York.”—School of Mines Quarterly, Vol. X. 
(1889). 
** Coal vs. Natural Gas.”—Black Diamond, Aug. 3d, 1889. 
‘*The Rock Salt Deposits of the Salina Group in Western New York.” 
—Trans. N. Y. Acad. Sci., Vol. IX., No. 2 (1889). 
GEOLOGY, GENERAL. 
**On the Origin of the Quartz Pebbles of the Carboniferous Con- 
glomerate.”—Family Visitor, 1851. 
**On the Mode of Formation of Cannel Coal.”—Amer. Jour. Sci., 
Vol. XXITII., (1857), p. 212. 
“Geology of California and Oregon.”—United States Pacific Railroad 
Report, Vol. VI. (1857), pp. 1-73, pl. V. 
**The Rock Oils of Ohio.”—Ohio Agric. Report (1859), and Reprint, 
pp. 16. 
‘‘ Explorations in New Mexico.”—Amer. Jour. Science, Vol. XXVIII, 
(1859), p. 298. 
«« The State-House Well of Columbus, Ohio.”—Rept. of the Supt. of 
State-House, 1860, and Reprint. 
‘Geology of the Region traversed by the Colorado Exploring 
Expedition.’’— Washington (1861), 4to., pp. 153, pl. 6, 2 maps. 
‘©On the Age of the Coal Formation of China.”—Amer. Jour. Sci., ii., 
XLII, (1866), pp, 151-154. 
‘“The Surface Geology of the Basin of the Great Lakes.”—Proc. 
Boston Soc. Nat. Hist. Vol. IX. (1862), and Reprint, pp. 7. 
“Sketch of the Geology of Ohio.’—Walling’s Atlas of Ohio (1868), 
with geological map. 
“‘ Geological Survey of Ohio.”—Report of Progress for 1869, Part I., 
pp. 1-52, map and chart. 
‘On the Surface Geology of the Basin of the Great Lakes and the 
Valley of the Mississippi.”—Annals Lyc. Nat. Hist., Vol. IX. (1870), 
p. 213. (See also Am. Journ. Sci., ii., XLIX., pp. 111 and 267 (1870). 
«The Geological Survey of Ohio.”—Address delivered to the Legis- 
lature, February 7th, 1870, pp. 60. 
Transactions N. Y. Acad. Sci. Vol. XII. June 6, 1893, 
