Describes raw materials used in telephone manufacturing. Women pick cotton at a cotton farm in United States. Bales of cotton taken on hand carts. Animation shows the use of cotton thread inside a telephone's transmitter.
Describes raw materials used in telephone manufacturing. The map shows a location of British Columbia. Animation shows mining of gold through tunneling in a mountain. Gold ore mined inside a gold mine in British Columbia. Gold is smelted and poured into molds for casting slabs.
Describes raw materials used in telephone manufacturing. The map shows a location of Queretaro in Mexico. Workers collect molten silver pouring from a huge bowl at a smelter. Silver ore is crushed in a huge stone crusher. Workers load ore bags on their backs. Workers stack slabs of silver.
Describes raw materials used in telephone manufacturing. The map shows a location of Russia. Platinum mined in the dredges of Ural Mountain streams. Hand examines crushed platinum ore in a bowl. Mixture of silver, gold and platinum is melted and poured into mold. The resultant alloy bar is placed between samples of gold, silver and platinum on a table. Animation shows use of the alloy in a telephone instrument.
Describes raw materials used in telephone manufacturing. The map shows a location of Sumatra in Indonesia. View of the island. Natives around their settlements on the island. Natives outside a Sumatran temple. Houses of Sumatran architecture in a village. Rubber trees are girdled and latex is collected. Natives bring latex in containers. The containers are weighed and coagulated. Coagulated rubber is taken out. Rubber blocks are loaded into railroad cars by Sumatran natives for transportation. Picture shows a telephone receiver made up of rubber.
Thomas Edison operates a movie camera, evolved from his kinetoscope invention. He makes a movie image of Henry Ford, seated in a chair in front of the camera.