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The Four-Track Stone Arch Bridge of the Pennsylvania Railroad across the Susquehanna River

Some Data on the Cost of Operating Automobiles for Commercial Purposes

By Hiram Percy Maxim

Electricity as a Motive Power for Automobiles

A Powerful Gasoline Locomotive

By the English Correspondent of the Scientific American

Russian Railroads Report

Contemporary Electrical Science

Hydraulic Spring-Testing Machine

Purification of Potable Water by means of Ozone

By GG. Erlwein

Mining Ore in the Mesabi District

By Kirby Thomas

Production of Camphene Free from Chlorine

Electrolytic Iron

By C. F. Burgess and Carl Hambuechen

The De Brouwer Mechanical Stoker

A Forgotten National Highway: Pennsylvania's First Mountain Railroad

By William Allmand Robertson

Sofka and Blue Dumplings—A National Indian Dish

By William R. Draper

Ginseng: Its Character, History, Commerce, and Medicinal Value

By Charles H. Coe

A Résumé of some Recent Studies of Radio-Activity

Electrical Notes

Trade Notes and Recipes

Trade Suggestions from United States Consuls

Engineering Notes

Patents!

Departments

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    May 07, 1904

    Think Outside the Gift Box