A film titled 'Safety Glass' shows chemists test, safety glass in a lab in United States. Samples are made to undergo a variety of tests including humidity tests. Safety glass is processed in a sun arc machine. A half pound steel ball dropped from a height of 16 feet causes only a crack in the safety glass and proves its strength.
Triplex glass plates are placed in plaster of paris in a factory in United States. Processes of production and conveyor belt system for the production steps are shown. Shows plates polished with sand, rouge and other materials, and cleaned with acid. They are cut to size.
A film titled 'Northern France and Belgium' shows United States 1st Army Engineers construct spans over a river in France during World War 2. Soldiers cross over Pontoon and Bailey bridges. Tanks fire fiercely at the enemy targets, causing fire and smoke.
After effects of atomic bombing in Nagasaki, Japan during World War II. Base of a displaced concrete column. A steel column uprooted from its concrete base. An electric pole with a number of broken wires attached to it. Japanese workers remove debris from the area.
After effects of atomic bombing in Nagasaki, Japan during World War II. Uprooted trees are seen as a Japanese carry a trunk of the tree. People pass by a wrecked concrete structure.
United States Navy aircrafts A-7E and F-4J take off aboard the super carrier Kitty Hawk in Pacific. A-7E aircraft comes in for recovery. Arresting cable being moved to its normal position across flight deck. A man checks arresting cable.
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