The Submarine Boat Disasters

Fast Long-Distance Trains

Ventilation of the Subway

The Effect of the War on Naval Construction

New Method of Milk Analysis by Centrifugal Apparatus

Loss of Heat in Steam

A Vagary of the Russian Press Censor

The Current Supplement

An Explanation of Ice Caves

Selection of Transmission Voltages

The Alvares Aeroplane Flying Machine

By the English Correspondent of the Scientific American

The Creation of Life by Artificial Means

On a Process of Measuring Nervous Susceptibility

Mines and Entanglements in the Russo-Japanese War

A Model Photographic Laboratory

A Power Brake and Whistle for Automobiles

Some Unusual Discoveries of Variable Stars at Harvard Observatory

The Capillary Motor

A Novel Reflecting Lantern

A Beehive Incubator

A 750-Ton Metal Mixer

Business and Personal Wants