Volume 100, Issue 7
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Features
Congress and Military Aeronautics
The High-Pressure Fire Automobile
The New York Motor Boat Show
Cuba's Debt to our Engineers
Science
Electricity
Engineering
Projecting Moving Pictures in the Light
An Egyptian Steam Cultivator
By our Correspondent in Paris
The Opposition of Mars in 1909
Comparison of Wright and Voisin Aeroplanes
More Curious Facts about Numbers
Magnetism and the Aurora
The Aurora Borealis and Morehouse's Comet
The Practical Side of Aerial Locomotion
Novel Life-Saving Apparatus
By our English Correspondent