The SciencesMarch 25, 1916
An Ingenious Gas Turbine Developed in Germany, A Typewriter That Copies with its Own Eye
Stories by Sydney F. Walker
The SciencesSeptember 12, 1914
Electric Mine Gas Detectors
Different Devices that Have Been Used or Suggested to Test for Gas with an Electric Lamp
The SciencesDecember 5, 1908
Low Temperature
Its Mechanical Production