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Features

A Visit to the Exposition of 1900

Plan of the Pan-American Exposition

An Extraordinary Telephone Accident

The Cost of Electricity from Isolated Plants

Selected Formulæ

Trade Notes and Receipts

The Value of Para Rubber

Sugar from Watermelons

Solubility of Copper in Gelatine Solution

Trade Suggestions from United States Consuls

Krupp Central-Pivot Gravity and Spring-Return Carriages for Naval Ordnance

Bessemer Steel Production in 1899

Is the Steering of the Modern Screw-Propelled Vessel Defective?

By Cornelius W. McKay

On Mounting Prints without Cockling

Porcelain and Watch Dial Pictures

The Nature of the Elements

By Curt Schmidt

The Doctor outside of Medicine

By William L. Stowell

Patents!

Departments

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March 31, 1900

Think Outside the Gift Box