A series which introduces and explains to the child the working and the mechanics of things he is familiar with, while also tracing their history. Scientific principles are explained with simple diagrams and supplemented by anecdotes and cartoons. |
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 How It Works The Aeroplane |
 How It Works The Motor Car |
 How It Works The Railway Train |
 How It Works The Ship |
 How It Works The Telephone |
 How It Works Television |
 The Computer NEW! |
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