by Guardian Staff on (#6PZET)
Dr William Whewell | John Prescott | International Apostrophe Day | University vice-chancellors | Musk and TrumpRe pylons (Letters, 12 August), as an admirer of these vital lifelines with their graceful catenaries, I often recall the words of DrWilliam Whewell (1794-1866), in his Elementary Treatise on Mechanics: Hence no force however great can stretch a cord however fine into an horizontal line which is accurately straight: there will always be a bending downwards."