Under water tunnel construction. A power plant water tunnel construction for the Ford Motor Company in the United States. Workers talk standing at the entrance of the plant. Cars at the entrance of the plant. Men push loaded and unloaded hand cars into and out of a tunnel. Workers roll concrete blocks on a car into the tunnel. They attach a block to a crane. The crane moves the block into position for an erector to pick it up. The erector picks up the block and swings it into place in the roof of the tunnel.
United States Army Air Corps Keystone LB-5A drop bombs on a concrete bridge over the Pee Dee River in Albemarle, North Carolina. A bomb strikes a concrete bridge. Water splashes due to the bombing. LB-5A bomber aircraft drop bombs. An explosion on the bridge. Smoke rises due to the explosion. A hit on the bridge. The wrecked bridge.
First Pursuit Group tests winter equipment during maneuvers in Oscoda, Michigan. A modified United States Army Air Corps fighter aircraft Curtiss P-1 Hawk stationary on snow. Skis on the aircraft. The aircraft being warmed up prior to a take off. Crew turns the propeller of the aircraft. The propeller turns. A pilot in a cockpit. A row of stationary P-1 Hawks equipped with skis on a flight line. A tower building in the background. Ground personnel turn the aircraft around. Snow blown due to the propeller blast. A P-1 Hawk taxis on the snow field and takes off.
Sergeant R. L. Bose demonstrates reliability of Air Service parachutes and disproves a theory that a man falling 500 feet or more loses consciousness. Civilians and military spectators watch the demonstration. Views from the airplane as Sergeant Bose free-falls from 3000 feet, delaying his chute opening until 1500 feet. Some of his free fall in slow motion. He makes a routine parachute landing. Spectators and an ambulance come as a precaution to his landing point.
Parachutist jump and set a new record at Chanute Field in Illinois, United States. Ten parachutists board a transport aircraft. A close up of heads and faces of the men framed in the circular doorway of the aircraft. The C-3 transport aircraft in flight. The parachutists jump one after the other. They descend towards the earth. Eight parachutes descend. The airmen who made to jump.
Aircraft dust cotton fields and swamps to kill boll weevil and mosquitoes in the United States. A hangar. A pilot and crew members stand in front of the hangar which has three compartments. Officers and civilian pilots of aircraft check a map of the area to be dusted. U.S. Army aircraft De Havilland DH-4M2 in the background. Crew members prepare two De Havilland DH-4M2 for the take off. The aircraft dust the cotton fields. Swamps are sprayed to destroy malaria mosquitoes. The aircraft hedge-hop over swamp lowlands and tree covered terrain dusting the spray. A haze over the area.
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