The Reserve Officers' Training Corps at Camp Jackson in Columbia, South Carolina. Cadets perform calisthenics. A cadet instructs them. He stands on a table. Buildings and trees in the far background. The cadets play various games.
Reserve Officers' Training Corps (ROTC) students engage in a mock battle at Georgetown University (3700 O St NW, Washington, DC 20057, United States) in Washington DC, United States. They stage maneuvers. Infantry units advance in skirmish formation. Mortar batteries fire.
Reserve Officers' Training Corps (ROTC) students engage in a sham battle at Georgetown University in Washington DC, United States. A wireless telephone station. Signal Corps cadets receive information on telephone. An aircraft in flight overhead. A man talks over a radio and receives information.
Reserve Officers' Training Corps (ROTC) students engage in a sham battle at Georgetown University in Washington DC, United States. Infantry units advance behind tanks. A tank moves forward. Soldiers fire rifles and advance. Some of the soldiers seated near an artillery piece. A building in the background. A tank advances. An officer instructs a soldier to fire a gun. Soldiers lying in prone position fire rifles.
'Silver mining in Ontario ' about mining operations in silver mines in Ontario, Canada. Silver mines in Northern Ontario, Canada. Miners line up as they enter a lift that takes them 400 feet underground to a mine. A man at a throttle as he pulls it. Miners conduct drilling in the underground mine. A miner drills into the roof of the mine. Rocks being blasted with an explosive. Pieces of rock after the blast. A worker with a mine helmet with a torch in front. A miner drills into the rocks to extract silver. Timber being used to support broken ores after the blast. Ore being drawn out by a man as he empties it out in a container car. Men push around the cars. An electric engine pulls the cars to a central station.
Mining and processing operations in silver mines in Ontario, Canada. Extracted ore of silver being elevated up from underground mines to the surface. The ore being poured out in a container for crushing. The ore being transported along cables in cars to mill storage bins. It is checked for size. Coarser ore moves along a belt and the high grade ore being separated from that of the low grade. High grade ore being emptied out in a container and then being crushed by machines as workers look on. Water being released as ore is washed to remove impurities.
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