1870s Sir William Crookes developed the first cathode ray tube to have a high vacuum inside.
See Also
Are X-Rays Outclassed by Powerful New Odic Ray
Atomic Cluster X-Ray Emission
black cathode hole
Cathode
cathode beginning of matter
cathode birthplace
cathode dividing point
cathode mother womb of space
cathode ray
cathode Source
cathode zero
centering cathode
Cosmic Electronic Vacuum Tube
Cosmic Rays
Cosmic vacuum tube
Death Ray
dividing cathode
Ed Gray
electric tube
electronic seed tube
electronic tube
electronic tube seed
eternal cathode Selves
gamma rays
gas-filled tube
Odic Activity Ray
Odic Ray
Odic Ray - Hollingshead
odic rays
ODIC-ACTIVITY RAYS
rays
stillness of cathodes
sympathetic rays
The Odic Ray - Its Origin and Nature
triune rays of Infinity
uranium rays
vacuum tube
Violet Ray Machine
white ray
X-ray
zero cathode
zero centers of the cathodes
zero in the cathode