Chemical Warfare Service training in the United States during World War I. An officer addresses a group of soldiers, giving last minute advice as they prepare to depart for active combat in France. He discusses persistent and non-persistent agents and conditions of temperature inversion favorable to gas attack.
Chemical Warfare Service training of U.S. Army trains in the United States during World War I. American Army soldiers wearing gas masks attempt to identify chemical agents as they are discharged on a field. The Division is deployed in trucks and on foot. Soldiers move forward in a line around a hil and along a muddy road. Soldiers lying in foxholes as cloud of gas approaches. One soldier swings a gas alarm ringer round and round to alert everyone. Other soldiers immediately don their gas masks. Later wind conditions allow them to rest. But the enemy fires gas shells into their midst anyway. So they must don gas masks again. A patrol goes out and encounters mustard gas. They check wind to avoid contact with it and move upwind.
The Yellowstone National Park in Wyoming, United States. A bear cub climbs down a tree in woods at the park as the mother bear stands under the tree. Another bear cub climbs down the tree.
Tractors plow a farm field in the United States. Tractors pull 16 feet wide seed drills. Views of early model powered engine farm tractors.
A man cuts the grain with a scythe and another man picks up stalks. A man with a scythe in his hand talks to another man in a field. Manual harvesting takes place. A different farmer uses a horse driven mechanical reaper to harvest crops in the farm field.
Manufacturing of aircrafts in United States World War I. A lumber camp with American flag hoisted. Men engaged in lumbering with railroad cars in the background.
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