Charles Darwin: a life in pictures

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The 'wormstone' at Down House. Darwin used the original to measure the rate of sinking of the stone due to the actions of earthworms. See his book on the subject here.

The stone now at Down House was reconstructed by Horace Darwin's Cambridge Instrument Company in 1929 when Down House became a museum open to the public.

Photograph by John van Wyhe.

 

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