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The Conquest of the Sahara

Dr. De Morgan's Discoveries at Ancient Susa

Santa Ana Canal

By J. B. Lippincott

Australian Bridge Building

The Elliott and Hatch Typewriter

Trade Suggestions from United States Consuls

Selected Formulæ

Miscellaneous Notes

Trade Notes and Receipts

Vehicles of the World

The Müggelsee in Winter

The Service Building of the Pan- American Exposition

Packing Instruments for Transportation

Improvements in Mansard Roofs and Dormer Windows

Improvements in the Three-Wire System

By Alton D. Adams

Mr. Marconi on Wireless Telegraphy

Disinfection and Prevention in the Sickroom

By Charles Harrington

Guns of Position and Siege Guns for the War

The Schneider-Canet Guns

Acetylene and the Manufacture of Mineral Blacks

By M. Georges F. Jaubert

The Method of Testing Road Metals

Manufacture of Tiles in Persia

The Emden Rathaus model of an Old Warship

Trip from Teheran to Susa

By Jacques de Morgan

Copper-Coated Zinc Plates for Process Blocks

A Training-Ship for the Merchant Marine



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