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Features

The Smithsonian Exhibits for the St. Louis Exposition

By Randolph I. Geare

The Motor Truck Problem

Radium.—I

Present State of the Sulphuric Acid Industry in Europe

By G. Lunge

Methods of Collecting Anthropological Material

By Harlan I. Smith

Improvement in Yarn Manufacture

A Chat about Spoons

The Business Opportunities of Cuba

By Frederic M. Noa

Electrolytic Refining of Lead

The First Electric Trunk Railroad in Great Britain

By the English Correspondent of the Scientific american

Contemporary Electrical Science

On the Magneto-Elastic Detector

An Automobile Sled

Electricity vs. Mule Power on Canals

By H. M. Riseley

The Scherzer Rolling-Lift Bridge

Oil Shells

The Origin of Pearls

Exploring Weddell Sea

Engineering Notes

Electrical Notes

Trade Suggestions from United States Consuls

Trade Notes and Recipes

Patents!

Departments

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April 09, 1904

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