Manfred von Ardenne
This book once issued in 1933 has been copied integrally
Why copying such an out of date book?
Because, in my perception, it is worth it
ad it shows you unique photos of the early days of cathode-ray tubes
Some of which are really nice.
An example of explanation of the so-called Wehnelt-cylinder application
This latter Wehnelt-cylinder were regularly used in Manfred von Ardenne's early cathode-ray tubes
In my perception intriguing photos
Die Kathodenstraohlroehre von Manfred von Ardenne (the integral book copy in PDF)
By Arthur O. Bauer