Stephen Herbert is back again with an extraordinary story:
Probably time to come clean - there's been some deception here.
When we say "tunnel" we tend to think of a wide tube - like the Channel Tunnel. A Telectroscope doesn't need width for all of its length to work. For most of the distance, just a few inches (maybe less?) would do the trick. When the Victorians laid the Trans-Atlantic cables for the telegraph, they invented the method that could be used to lay hollow cable sheaths - which were set in a shallow trough and covered (hence technically, 'tunnels'). Effectively the Telectroscope is a form of opto-telescope (not to be confused with the earlier optical telegraph).
Today, we're familiar with fibre optics, and the idea of light not having to travel in a perfectly straight line doesn't phase us, but to the Victorians it seemed impossible. To some, makyoh topography is still something of a mystery, but in theory it COULD just work.
(Heaven knows how much money Paul must have spent on cleaning out that 'tunnel' - did he have Dyno-Rod on board?!).
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