Morse code

Recently while visiting antique bookshop in Eton (UK), we found there some real gems and brought home for our lab library a series of vintage popular science education books published from 1920's to 1970's in UK. Some pages will be posted here, because they are too good to be left in the fog of anonymity and dusty shelves.

Illustration: The story of Radio - A Ladybird 'achievements' book, 1968, Ladybird & Penguin (c)

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