SA Supplements

The Underground and Elevated Electric Railway in Berlin—Now Completed and in Operation

A New Egyptian Railway

The Ruthenberg Electric Iron Process

Commerce in the Soudan

Electricity in Glass Manufacture

Coal-Saving Devices

Core-Wire Straightening Machine

Anthracite's downs and Ups

Recent Developments in Coloring Matters

The Sigriste Photographic Apparatus

The Steam Turbine—Its Commercial Aspect

Making Eggs Tell their Ages

Peary's Work in 1901-1902

The Life of a Xiphopagis, or “Siamese Twins.”

The Electrical Conductivity of Plant Juices

Cold Storage for Apples

Selected Formulæ

The Lightest of all Woods

Trade Suggestions from United States Consuls

Trade Notes and Recipes

Patents!

Correspondence - November 1, 1902