Volume 114, Issue 4
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Features
Making of X-Ray Tubes in War Time
How the Unparalleled Demand for Tubes Was Met by French Manufacturers
Simple Food Tests
Experiments by Which Adulterants May be Detected
Strategic Moves of the War, January 13th, 1916
By Our Military Expert
The Pine Needle Oil Industry
How the Thrifty Europeans Utilize a Waste Product of the Lumbering Industries
Deriving Fat from Yeast, Waste Newspapers as a Fuel for Military Camps and more
By Our Berlin Correspondent