A documentary in the United States on the occurrence of tropical cyclones. A ship anchored at a port. Preventive measures being undertaken by the ship's crew. Mooring lines are doubled and tied properly. Men working on the ship. A ship underway at sea. Men working on different instruments on the ship. Men filling tanks. Water tight security should be ensured. Measures to prevent flooding of the ship should be undertaken. Compartments should be checked. A ship underway at sea. It is stuck in a typhoon. Water breaks over its surface.
Riots after a clash between the Bonus Marchers and the police in Washington DC, United States. The 3rd Calvary from Fort Myer, the 1st light tank regiment, and the 12th Infantry march down the streets to rout the Bonus Army comprised of World War I veterans during the great depression. A large crowd gathered on the streets. Smoke rises due to the use of smoke bombs and tear gas. Troops are seen wearing gas masks to ward off the smoke. Some veterans are arrested during protests. Shots of bonus marchers shanty town being burned down. Firetruck is seen standing by as the buildings burn.
The heat treatment of front axles of automobiles in the United States. Interior of a building. The axles slowly move through a furnace with the temperature gradually increasing. The temperature is held at a point for 15 minutes to ensure absolute uniformity. The axles automatically descend into an oil bath after this process. The oil must be kept at the proper temperature to give the steel maximum strength. The oil temperature is recorded in the control office. The oil is cooled by cold water pipes. The water is cooled by fountain sprays. A storage tank replaces the oil. Cooling of the axles in the oil bath. This completes the first step of heat treatment called hardening. Metal at this stage is viewed under a microscope. Comparison of the appearance before and after hardening. Tempering of the metal to relieve the strains set up during the hardening process.
A film on manufacture of dynamite in the United States. Nitrate of soda is brought from South America and is used in crystalline form as an ingredient of dynamite. Men working for the manufacture of dynamite. A ship at a port. Men unloading sacks from the ship. Wood pulp is also used as a raw material in the manufacture of dynamite. The other material used is the nitrate of ammonia. Nitrate of soda is converted into nitric acid. It is dumped into huge retorts and is treated with sulphuric acid. Nitric acid vapors are condensed to a liquid in tiers of water-cooled glass pipes. Nitric acid is used to make nitroglycerin which is one of the most powerful explosives. Exterior of a building. Mixed nitric and sulphuric acid is run into a nitrator and refined glycerin is slowly added. The operator watches the thermometer as the chemical reaction releases an enormous amount of heat. An explosion can occur if the heat is not carefully controlled. He also watches the charge through a sight glass. Nitroglycerin and waste acids flow from the nitrator into a lead-lined trough which leads to a separator. The nitroglycerin rises to the top as the mixture settles. Then it is washed and led into storage tanks. It is transported to a dynamite mixing house in a rubber-lined and rubber-tired cart. Men working inside the building. A proper amount of the dry ingredients is poured into a mixing machine. Nitroglycerin is added to it. The mixture is further processed under revolving rubber-shod wheels.
Film based on advantages and procedures of using U.S. Army training films. U.S. soldiers watch a training film in a film projection room. U.S. gun crew fire heavy artillery gun after being trained. Shows how German army made use of military training film to carry out successful invasion during World War II. German officer and troops plan an invasion and review a model of landscape. German paratroopers are seen leaping from German Junkers Ju-52 aircraft, dropped by Nazi planes over Greek island of Crete during World War II. Includes scenes from inside aircraft of German paratrooper soldiers jumping out aircraft door, and scenes of paratroopers in the sky descending. U.S. soldiers watch an army training film. A U.S. soldier teaches his buddy how to put on a gas mask and application of knowledge gained by training film. U.S. troops aboard landing craft heading for beach. U.S. soldier ducks in a foxhole while enemy tanks advance. U.S. troops undergo training in rifle fire and hand to hand combat on a training field.
U.S. 1st Division soldiers in Africa during the North African Campaign of World War II. U.S. troops aboard a 2 ½ ton truck pulling a 37mm antitank gun along a road. Another truck with water cooled MG (machine gun mounted) and troops move past. A jeep and a T28E1 anti aircraft half track with a trailer follow the truck. Italian prisoners are marched under guard. A long line of prisoners marches across a hilly terrain. U.S. jeeps, 3/4 ton Dodge command cars and a 75mm M3 GMC (Gun Motor Carriage) anti tank half track loaded with troops pass along a road.
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