Life before email: A look back at the 'vacuum post' 
Published: 27 Nov 2008 15:11 GMT
After World War II the system continued to function and, according our guide, it was not until the 1970s that it fell into complete disuse. This section shows part of the system as it has remained since the end of its operational life.
According to the guide, work started on the system in the 1870s and remained in operation until the 1970s. How much of it was electric-powered in its early years is unclear, but for much of its life it worked as shown here.
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