From 1943 ~ How a vacuum tube works. More Progress.
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An interesting You Tube video from 80 years ago on: How a *Vacuum Tube
Works*. It's short but lays out the fundamentals of operation of a Triode
Vacuum Tub...
30 minutes ago
I remember reading an Arthur C. Clarke story about a light sailor called: The Sunjammer when I was a kid. It was in the March 1964 issue of Boys' Life - Google Books has it up if you'd like to read it: < https://books.google.com/books?id=HEFsdunJeZMC&pg=PA3&dq=the+sunjammer+march+1964+boys%27+life&hl=en&sa=X&ved=2ahUKEwi_nNCho6DpAhUHK80KHb6GBgkQ6AEwAXoECAEQAg#v=onepage&q=the%20sunjammer%20march%201964%20boys'%20life&f=false >
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