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Features

Printinǵ Post Office Money Orders

By Thomas D. Gannaway

The Great Star Map—II

Star Counting

By H. H. Turner

The Extension of Wireless Teleǵraphy

Variation in the Purchasinǵ Power of Gold

London's Electric Trains

Railway Engineering in the British Metropolis

Startinǵ a Gas Enǵine with Steam

Extensive Seaport Improvements at Havre

The Motor Fire Enǵine

The Automobile to the Rescue

Practical Aspects of Printing Teleǵraphy—VII

An Inventor on the Difficulties to be Encountered and the Way to Overcome Them

By Donald Murray

The Sun's Distance Determined from Eros

Freiǵht Handled Mechanically

Electrical Motor Driven Portable Conveyer which Handles PacKages, Cases and Lighter Cargo

Superheater Usinǵ Waste Heat

A Contribution to Factory Economy

The Bioloǵy of the Savant

A Study in the Psychology of Personality

By Wilhelm Ostwald

The Sick Pearl Necklace of Madame thiers

Manufacture of Cocaine

The Chemical Preparation of an Important Drug

Headless Butterflies

The Sportinǵ Airship “Parseval V.”

A Three-passenger Craft

A New Construction in Worm Gearinǵ

The Endless Screw as a Reducing Gear

Recent Researches in the Field of Radio-activity

A Review of the Present State of Our Knowledge

By Henrich

Trade Notes and Formulæ

Wireless Teleǵraphy and the Aeroplane

Science Notes

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