Einstein's Clocks, Poincare's Maps: Empires of Time

He spent his time reading
by Peter Galison | Science | This book has not been rated.
ISBN: 9780393020014 Global Overview for this book
Registered by wingGoryDetailswing of Nashua, New Hampshire USA on 2/4/2020
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Journal Entry 1 by wingGoryDetailswing from Nashua, New Hampshire USA on Tuesday, February 04, 2020
This hardcover was among the books donated to the public library for distribution to the Little Free Libraries. It's a look at the history of attempts to improve timekeeping to the point where separate clocks - at the opposite ends of train stations, for example - could be guaranteed to show the same time. This is interspersed with Albert Einstein's experiments in measuring time via telegraph - and also with those train-station clocks, the finer points of which I hadn't appreciated until now {wry grin}.

The book as a whole is a bit more dry than I'd hoped, given the subject matter, but it has some intriguing points, including mathematician Henri Poincaré's work as a mine safety officer - when he mapped air flow through a mine's tunnels to work out the origin of a deadly explosion!

Released 1 mo ago (10/25/2020 UTC) at Little Free Library, School St. in North Chelmsford, Massachusetts USA


Guidelines for safely visiting and stocking Little Free Libraries during the COVID-19 pandemic, from the LFL site here.

I left this book in the Little Free Library on this cool autumn day; hope someone enjoys it!

[See other recent releases in MA here.]

*** Released for the 2020 Tick Tock challenge. ***

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