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Features

The Automobile Race “Tour De France”

The Work of the International Association for Testing Materials

Elevators

By Charles R. Pratt

Photographic Surveying

Lathe Center Grinding Apparatus

Trade Suggestions from United States Consuls

Miscellaneous Notes

Trade Notes and Receipts

Selected Formulæ

Life on the Schoolships of the German Navy.—II

Instruction in Seamanship

The New Main Entrance of the Berlin Zoological Gardens

Electric Railway from Milan to Monza

Power at the Paris Exposition

By John T. Bramhall

Electrical Protection of Safes and Vaults

By Clyde J. Coleman

Taxation in China—Rates Imposed and Method of Collection

Roman Gifts for Health a Thousand Years Ago

Variations in Human Gait

By E. H. Bradford

Notes upon the Early History of Gas Manufacture

By H. C. Slaney

How a Bell is Tuned

Dust Whirls and Fairy Dances

Patents!

Seedless Grapes

Departments

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