Дж.Д. Левенталь

Breathing

The Torpedo, Hornet of the Sea

The Rudiments of Flying

The Panama Canal

Freak Patents: The Balloon R.R.

The Gasoline Engine

The Aeroplane Machine Gun

A Submarine Destroyer

Fiske Torpedo Plane

Mechanical Operation of British Tanks

Traveling Forts

The Submarine Mine-Layer

An Engineering Problem