Electrons were first discovered as the constituents of cathode rays.

During the last quarter of the 19th century many experiments were done to determine what cathode rays were.

This happened while he was working with cathode rays in 1897.

The design requires cathode ray monitors to be deep and heavy.

In 1895, Perrin showed that cathode rays were of negative electric charge nature.

Among his scientific research were studies that explained differences between x-rays and cathode rays.

He discovered the properties of these particles, now called cathode rays.

Indeed, much development work is required before cathode ray tube performance can be attained.

Crookes tubes are now used only for demonstrating cathode rays.

All this experiment really showed was that cathode rays were able to heat surfaces.