This picture seems to be from a bubble chamber from the '50s.
The bubble chamber is similar to a cloud chamber in application and basic principle.
He put the idea into practice having assembled the device known now as bubble chamber.
(In bubble chambers, photographs were made, printed and then looked through.)
That is why the track a particle makes when going through a bubble chamber looks almost straight.
Occasionally the great bubble chamber that was the sky.
The trial was held in a huge white bubble chamber.
A fifth method, involving bubble chambers, can be used to detect cosmic ray particles.
In effect, each droplet behaves as a miniature bubble chamber.
The bubble chamber enabled him to observe the paths and lifetimes of the particles.