The SciencesMay 22, 1909
Kaemper's Discoveries in the Mammoth Cave
Stories by Horace C. Hovey
The SciencesJuly 8, 1905
Strange Mazes and Chasms in Mammoth Cave
The SciencesNovember 21, 1903
The Colossal Cavern of Kentucky
The SciencesAugust 29, 1903
Balloon Measurements of Mammoth Cave's Height
The SciencesJune 15, 1901
The Lead and Silver Mines of Newbury
The SciencesNovember 24, 1900
Symbolic Rocks of Newbury and Byfield, Mass
The SciencesSeptember 9, 1899
Scientific Congress at Columbus
The SciencesSeptember 2, 1899
The American Association for the Advancement of Science
The SciencesJuly 22, 1899
Mapping the Mammoth Cave
The SciencesSeptember 24, 1898
The Transsi-Berian Rail-Road
The SciencesSeptember 3, 1898
Golden Anniversary of Science
The SciencesAugust 6, 1898
The Approaching Scientific Jubilee
The SciencesApril 16, 1898
Jubilee Anniversary of the American Science Association
The SciencesApril 9, 1898
The Aven Armand, Lozere, France
EnvironmentOctober 2, 1897
The Seventh International Geological Congress
EnvironmentMay 8, 1897
Our Saltpeter Caves in Time of War
The SciencesMarch 13, 1897
About Merrimac Ship Building
The SciencesOctober 17, 1896
The Essex--Merrimac Bridge
The SciencesSeptember 19, 1896
Notes on the American Association Meeting, Buffalo, N. Y.
The SciencesSeptember 12, 1896
Notes on the American Association Meeting, Buffalo, N. Y.
The SciencesDecember 22, 1888
The Vibratory Law of Progress
The SciencesFebruary 8, 1879
Discoveries in Western Caves