180 TRANSACTIONS OF THE [Mar. 27 
«¢ The Physical Conditions Under Which Coal was Formed.”—School 
of Mines Quarterly, Vol. IV., No. 3 (April, 1883), p. 169. 
‘*Notes on the Geology and Botany of the Country Bordering the 
Northern Pacific Railroad.”—Annals N. Y. Acad. Sci., Vol. IIT. (1884). 
“The Drift Deposits of Indiana.”—Annual Report of the State 
Geologist of Indiana (1884), p. 85. 
‘*Discussion of Dr. N. L. Britton’s Observations on the Geology of 
the Vicinity of Golden, Colo.” Idem, p. 77. 
“The Eroding Power of Ice.”—School of Mines Quarterly, Vol. VI. 
(January, 1885). 
“The Meeting of the Geological Congress at Berlin, 1885.’—Trans. 
N.Y. Acad. Sci., Vol. V. (1885), p. 20. 
*“‘On the American Trias.”—Trans, N. Y. Acad. Sci., Vol. V. (1885), 
p. 18. 
**On the Geological Age of the North Atlantic.”—Trans. N. Y. Acad. 
Sci., Vol. V. (1885), p. 78. 
“*On Cone in Cone.”—Geological Magazine, Decade III., Vol. II. 
(1885), p. 559. 
‘“‘New York State Geology and Natural History.”—Encyclopedia 
Britannica, 9th Edition, Vol. XVII. 
“North America in the Iced Period.”—Pop. Sci. Monthly, November, 
1886. 
** Rarthquakes.”—School of Mines Quarterly, Vol. VIII., 18&6. 
‘* Harthquakes.”—What is Known and Believed of Them by Geolo- 
gists.”—Trans. N. Y. Acad. Sci., Vol. VI. (1886), p. 18. 
“‘ Origin of Graphite.’”’—School of Mines Quarterly, Vol. VIII., July, 
1887. 
‘* A New Meteorite from Tennessee.”—Trans. N. Y. Acad. Sci., Vol. 
YI. (1887), p. 160. 
*‘Synopsis of Historical Geology.’’—Appleton’s Physical Geography 
(1887). , 
“The Origin of the Loess.—School of Mines Quarterly, Vol. X. 
(1888), p. 66. 
«The Classification of American Palsozoic Rocks.’’—Report of 
Amer. Com. to the International Geological Congress (1888). 
‘‘The Laramie Group. Its Geological Relations, its Economic Im- 
portance and its Fauna and Flora.”—Trans. N. Y. Acad. Sci., Vol. IX,, 
No. 1, 8vo., pp. 6 (1889). 
‘“«The Origin of Coal.”—N. Y. Tribune, Feb. 13, 1890. 
‘“‘The Laramie Group.’’—Bull. Geol. Soc. of America, Vol. I., 524- 
‘532 (1890). 
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