Letter from William Edward Garner, on a paper 'The ignition of solid explosive media by hot wires' by E Jones to D C Martin, Assistant Secretary of the Royal Society Has had difficulty coming to a conclusion. The conclusions are on considerable interest but the author should discuss the implications of the conclusions. [Published in Proceedings of the Royal Society A, 1949]. Endorsed on recto as received 22 February 1949. 20 February 1949