The Balboa Docks
How the Solid Masonry Columns for Supporting the Great Wharves at the Pacific Ocean Entrance to the Panama Canal were Rapidly and Economically Constructed, Carrying the Foundations Down to Bed Rock...
"Notable Salvage Work Upon the Empress of Ireland, The Highest and Lowest Temperatures in the Atmosphere and more"
A Formula for Calculating the Tactical Value of Fighting Ships
War Experiences of an Air Scout-III*
A Battle in the Clouds
[Cover image of January 9, 1915, issue illustrates this article]
Measuring Human Intelligence
A Progressive Series of Standardized Tests Used by the Public Health Service to Protect Our Racial Stock
Temperature in Plants
Archimedes and his Lever, Dr. Hall, the Aluminium Pioneer
New Railway Signal
Recently Patented Inventions - January 9, 1915