The upward Trend of Mortality in Middle Life and Old Age
A Danger Signal and its Meaning
Volume 75, Issue 1943supp
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Features
The Aeronautic Show at Olympia
Description of Some of the Principal Machines Exhibited
Continuous Rail for Chicago Street Traction
The Story of a Rush Order
Electrification of Benzene by Friction
The Bacteriology of Ice
The Danger of Infection from Natural Ice not Very Great
Peroxides and per-Salts—II
Their Preparation, Properties and Uses in the Arts and Industries
City Passenger Transportation in the United States
Report of an English Engineer
Theory vs. Practice
The Frequency of Tubercular Infection
Gyroscopic Stabilizer for Ships
The Discovery of the Planet Neptune
Was It Chance or the Result of Scientific Plan?