Letter from J D Griffith Davies, Assistant Secretary of The Royal Society, on a paper 'Explosion waves and shock waves. VI. The disturbance produced by bursting diaphragms with compressed air' by William Payman and Wilfred Charles Furness Shepherd to the Ministry of Home Security Only a limited number of copies were printed and there are only four available from the Royal Society. A number of copies were sent to the Ministry of Supply and the Safety in Mines Research Board. They may be able to provide more copies. [Published in Proceedings of the Royal Society A, 1946]. 26 September 1941