Letter from David Forbes Martyn, on a paper 'The morphology of the ionospheric variations associated with magnetic disturbance. I. Variations at moderately low latitudes' by David Forbes Martyn, to D C Martin, assistant secretary of the Royal Society Paper reference code: A202 Martyn remarks it is possible to delete a table of data from his paper. Written at Commonwealth of Australia, Commonwealth Scientific and Industrial Research Organization, Radio Research Board, Canberra Section [Australia]. [Published in Proceedings A, 1953]. Endorsed on recto as received 17 December 1952. 11 December 1952