A Heat Flywheel

To Secure Better Rails

Investigations for the Gatun Dam

Former Chief Engineer Stevens on the Canal

Metchnikoff's Theory of Longevity

The Current Supplement

Copper-Clad Steel

Motors for Viticulture

The Wright Aeroplane Experiments

Machine for Making Window Glass

The “Caterpillar” Tractor

By the English Correspondent of the Scientific American

Range and Position Finders for Coast Artillery Fire Control

The Annular Eclipse of the Sun in June, 1908

A Magazine for the Blind

How Cave Air is Used to Regulate the Temperature of a House

A New Electric Renovator

A French Universal System of Machine Molding

Hose Nozzle with Movable Spray Cap

Improved Switchboard Plug

Folding Step Ladder

Folding Washing Machine for Stationary Tubs

Patent Department

Rail Lock and Tie Plate