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Preliminary Report to the Inventors' Guild—III

The Guild's Relation to Patent Practise

By F. L. O. Wadsworth

The Sketching of Mechanism in Designing

Much Time and Trouble May Be Saved by Judicious Methods

By Ford W. Harris

Soil Sterilization

Wanted—Cheap Antiseptics for Use in Horticulture and Agriculture

By E. J. Russell

A Chinese Railway Bridge

Spanning the World' s Most Treacherous River

By F. C. Coleman

Peroxides and per-Salts—I

Their Preparation, Properties and Uses in the Arts and Industries

By A. S. Neumark

Misapprehension as to the Novelty of the Friedmann Treatment

Wire Drawing

Methods and Machines Used in Manufacture

By Erik Oberg

The Vibration of Rifle Barrels

By Francis Carnegie

Marconi Multiple Syntonizer

The Crayfish

One Year's Catch in the United States Valued at $34,000

By Raymond C. Osburn

The World's Naval and Merchant Shipbuilding

Extracts from Lloyd's Official Report for 1912

Extinct Monsters of Alberta

Preventing the Steaming of Windows

New Books, Etc.


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