"It is not well, however, to leave this mystery of how "magnetism" picks up iron nails and "attracts" steel needles, unexplained, for the entire electrical engineering world is paying heavily for lack of this understanding in many ways, the more expensive one being the vast wastage caused by building improper coils, solenoids, armatures, step-up, step-down transformers and electronic tubes." [Atomic Suicide, page 185]
See Also
Cosmic Electronic Vacuum Tube
Cosmic vacuum tube
electric tube
electronic seed tube
electronic tube seed
Electronics
eternal electronic vacuum of Nature
gas-filled tube
principle of electronics
vacuum tube