Copy letter from Robert William Frederick Harrison, to Professor [William Henry] Bragg, Fellow of the Royal Society Has delayed replying to his letter of 30 July to see whether his letter was inserted in 'Nature', and he now sees that it is. Does not think there can be any sort of objection to the appearance of a short note such as would have been published as a meeting extract if the Royal Society had been in session, and so the paper is going forward for publication. 1 August 1913