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SA Supplements Vol 57 Issue 1479supp

SA Supplements

Volume 57, Issue 1479supp

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Features

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

Hiram Percy Maxim

Electricity as a Motive Power for Automobiles

Russian Railroads Report

A Powerful Gasoline Locomotive

By the English Correspondent of the Scientific American

Hydraulic Spring-Testing Machine

Contemporary Electrical Science

Purification of Potable Water by means of Ozone

GG. Erlwein

Mining Ore in the Mesabi District

Kirby Thomas

Production of Camphene Free from Chlorine

Electrolytic Iron

C. F. Burgess, Carl Hambuechen

The De Brouwer Mechanical Stoker

A Forgotten National Highway: Pennsylvania's First Mountain Railroad

William Allmand Robertson

Sofka and Blue Dumplings—A National Indian Dish

William R. Draper

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

Charles H. Coe

A Résumé of some Recent Studies of Radio-Activity

Trade Notes and Recipes

Electrical Notes

Trade Suggestions from United States Consuls

Engineering Notes

Patents!