Popular Science Monthly, v. 92, n. 4, 1918

Google Books

1918-04

Public domain

Is Part Of
Title	Alternate label	Class
Anti-airplanes net
Mammoth tractor
Electrical eaves-dropping
War Camouflage
Shelter bridges
Smoke for artillery practice
Aerial reconnaissance
Submersible fort
Italian war dogs
Protective coloring for ships
Dropping Death from the Skies
"Sausage" Captive Balloon
Why Tanks Are Giant Caterpillars
Depth-Bombs
Bell-shaped helmet
Observation balloon
Motorcycle
Acetylene trench gun
Torpedo-proofing ships with air tanks
Motion-picture scene-shifter
The mother ship
A Floral Tank Struck a Warlike Note at the Pasadena Carnival
Bullets That Shoot Through Steel
How the Zeppelin Raiders Are Guided by Radio Signals