Science and technology № 9 (1978)

1. "For the first time in the world."

A new machine for sinking inclined coal workings.

The winner of the State Prize Ya.

Ya.

Gumennik is the head of the team that created the car.

Testing of the machine at the Voroshilov mine at Prokopievskugol.

The car is lowered into the shaft.

A diagram of a coal mine (animation).

The operation of the drilling machine.

Disassembly of drilling tools in the mine.

The work of a new tunneling machine.

2. "A simple solution".

Large: grain in the palm of your hand.

A field with defective ears.

Cereal nematodes under the microscope.

Nematodes on the root of the cereal.

Plowing the field.

Fields sown with different crops.

3. "Sapphires on the streets".

A high-pressure sodium lamp with a gas tube made of artificial sapphire.

Laboratory tests of lamps with tubes made of different materials.

Products made of natural sapphire.

Pulling a sapphire crystal in the form of a tube from a molten aluminum oxide.

Evening city.