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Letter: For the record

Published 3 August 2016

• Gas turbines may have their blades inspected as often as every 7500 hours of operation (25 June, p 22).

• The papers on evolution by Alfred Russel Wallace and Charles Darwin were in fact presented at the Linnean Society in 1858 (16 July, p 24).

Issue no. 3085 published 6 August 2016

Â鶹´«Ã½ issue 3085 cover

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