Science and technology № 15 (1968)

1. Diffusion and ...vacuum.

Parts made of various materials.

Professor N. F. Kazakov.

Patents for inventions.

Diffusion of solutions.

Two cylinders made of different metals are placed on top of each other.

Diagram of the structure of the crystal lattice of two different metals.

2. Winter-summer.

Hydroelectric dam.

Tractor in the field.

The meteorologist takes readings of the amount of precipitation.

A snow-covered field.

Meteorologists measure the height and density of the snow cover.

The plane is in the air.

Cartoon diagram of measuring the thickness and density of snow cover from an airplane.

The recorder draws a graph of the thickness and density of snow.

3. The crime will be solved.

A police officer examines a lock broken by a burglar.

Pliers, hammers, laid out on the table.

Chisel at high magnification.

Comparison of the slices made by the robber's scissors.

The disability certificate is a bulletin.

The sick list is photographed in ultraviolet rays.

A bullet.

A murder weapon.

A police officer makes a control shot.

Circular photography of the control bullet.

Comparison of two bullets.

Drawing up a sketch.

Compare photos of criminals with sketches.

A group with a dog and a dog handler leaves for the next task.