Letter from Richard Tetley Glazebrook, on a paper 'The elastic limits of iron and steel under cyclical variations of stress' by Leonard Bairstow Letter apologising for the informal nature of his previous letter, as it was written 'somewhat hurriedly'. Going to send a more formal letter. [Published in Proceedings of the Royal Society, 1909]. Endorsed on verso as received 5 June 1909. 4 June 1909