The upward Trend of Mortality in Middle Life and Old Age

A Danger Signal and its Meaning

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

The Bacteriology of Ice

The Danger of Infection from Natural Ice not Very Great

Electrification of Benzene by Friction

Peroxides and per-Salts—II

Their Preparation, Properties and Uses in the Arts and Industries

The Frequency of Tubercular Infection

Theory vs. Practice

City Passenger Transportation in the United States

Report of an English Engineer

Gyroscopic Stabilizer for Ships

The Discovery of the Planet Neptune

Was It Chance or the Result of Scientific Plan?

Hygiene and Mortality

A Strange Case of Abnormal Anatomy