The SciencesMarch 21, 1914
The “Fossil Forest” of Arizona
Where the American Tourist Should Find Much to Interest Him
Stories by George P. Merrill
The SciencesJune 17, 1905
Gold and its Associations
The SciencesJuly 9, 1904
On the Glacial Pothole in the National Museum
The SciencesNovember 28, 1891
Our Sources of Tin
The SciencesApril 20, 1889
Salt from Sea Water
The SciencesJanuary 19, 1889
Among the Pennsylvania Slate Quarries
The SciencesJanuary 29, 1887
Our Building Stone Supply
The SciencesJanuary 22, 1887
Our Building Stone Supply