Popular Mechanics, v. 23, n. 3, 1915

https://books.google.it/books?id=mN8DAAAAMBAJ&lpg=PA271&hl=it

1915

Public domain

World War I

Is Part Of
Title	Alternate label	Class
Deadly Steel Arrow (flèchette)
Submarine torpedo boat
Water-cooled machine gun
Intrenching tool used as shield
Dummy Ship
Steel arrows dropped by French airmen over enemy trenches
The U.S. submarine "K-5"
The German submarine "U-9"
The British submarine "B-11"
Sea mines
Gasoline-empowered trench digger
Carbonic acid employed in pneumatic rifle
Steel-melting projectile
The use and repair of field telephone and telegraph in war
Periscope used in French trenches
German one-man trenches
Toy cannons
Hand cars
Barbed-wire, land mines and observation platforms used by armies during the war
The bayonet training of British recruits