The SciencesJune 1, 1927
Caves
To Young and Old There Is a Romantic Mystery In Cave Hunting and In the Exploration of Dim, Underground Passageways
Stories by Guy E. Mitchell
The SciencesApril 1, 1926
The Persian Lamb and Our Fur Industry
How the Crossing of Pure Imported Karakul Sheep with American Breeds of Sheep Will Make Possible the Production of Valuable Furs in the United States
The SciencesFebruary 1, 1926
Mapping Unknown Alaska
A Geological Survey, Filled with Romance, Danger and Hardship
EvolutionFebruary 1, 1926
The Standing Stone Forests of Wyoming
The SciencesApril 1, 1924
Running the Rapids of the Grand Canyon
An Exceptionally Hazardous Piece of Surveying and Mapping by Uncle Sam's Topographers
The SciencesMarch 1, 1924
Laying the Ghost of a War-Time Trouble
The Present Status of Our Potash Industry, and the Outlook for Ultimate Independence
The SciencesJune 1, 1923
Platinum
Where the valuable Metal From and Uses to Which it is put
The SciencesAugust 10, 1918
Radiotelegraphy
Its Uses and Possibilities in the War
The SciencesDecember 12, 1914
The Seed Supply and the War
Making Up the Shortage on Our Own Farms
The SciencesAugust 9, 1913
A New Baseball Indicator
The SciencesJuly 20, 1912
A Promising Industry
Statistics of American Fuel Briquet Manufacture
The SciencesDecember 31, 1904
The Egyptian Papyrus, Past and Present
The SciencesMarch 12, 1904
Collecting Rare Seeds and Plants for the Agricultural Department