Mining process of coal in the United States. Plus four inch coal is carried over picking tables and minus four inch coal is run through an air cleaning plant. Miners working on the picking tables.
Production of chewing gum in the United States. Workers pour ingredients into a large mixer. They place gum into a machine and cut strips into blocks. Blocks are rolled into slabs. A roller scores the slabs of gum. Women break slabs into individual sticks. A machine wraps the sticks of gums into packages. The machine scores the slabs.
Production of light bulbs in the United States. Wire hooks are placed in buttons to give filaments support. Machines in operation in a factory. A woman with pliers assembles the filaments. A machine is used for drilling. A filament is placed in a bulb. A screw socket is attached to the bulb. The lead-in wire is soldered to the base. A woman works. Neon signs on buildings.
An early cargo and transport aircraft of the United States Army Air Service in the United States. A U.S. Army Air Service Martin Transport airplane on a field. Exteriors of the aircraft. Interiors of the airplane with two men seated. They look out from the aircraft. Airplane propellers start to rotate. The motors warm up. The engine starts and the aircraft takes off. The aircraft lands after a flight.
Early transport aircraft of the United States Army Air Service in the United States. U.S. Army Air Service DH-4 Honeymoon Express on a field as an engine starts and the propellers begin to rotate. A pilot in the cockpit. Passengers in the compartment wave. Specifications of the aircraft. The airplane taxis and takes off. The aircraft in flight. It flies at a speed of 118 miles per hour. The aircraft comes in for a landing and lands on a field.
Early cargo and transport aircraft of United States Army Air Service in the United States. U.S. Army Air Service Fokker YIC-15 Ambulance airplane on a field. Propellers of the aircraft rotate as the engine starts. Men carry a litter patient and place the litter into the plane. Interiors of the aircraft has a cabinet with medicines. Mounting litters and padding on the side to absorb shocks. Aircraft warms up. Aircraft taxis.