The Open Door of Aviation, The Scientific American Aeronautical Trophy, the International Union for Co-operation in Solar Research

Engineering, Electricity, Science

The Wearing Qualities of Manganese Steel

Modern Steel Lock Bar Pipe Construction

The Contagious Diseases of Metals

The Researches of Prof. Ernest Cohen

Independence Day Casualties

The Aviation Meet at in Dianapolis, Wanted Information About Dishonest Patent Schemes

An English Judicial Opinion of Complex Patents

The German Dreadnought Nassau

The First of the German Fleet of Dreadnoughts to be Completed

Hamilton's Round-Trip Aeroplane Flight from New York to Philadelphia

A Remarkable Cross-Country Flight

New Filtered Water Supply for the City of Pittsburgh

How the Allegheny River Water is Purified and Delivered into the City Mains

Device for Testing Electric Wiring

Wandering Chemicals

Geissler Tubes from Electric Light Bulbs

Construction of a Simple Electrolytic Interrupter

Polariscope Attachment for Microscopes

An Electroplating Outfit

With Practical Working Formulae

Emery