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The Orpington Irises 1937; A Descriptive Catalogue and Price List of Irises, Cultivated by The Orpington Nurseries Company Ltd, at Croften Lane, Orpington, Kent

Paper: 'The "Pincushion Grid" Illusion' by Roy Markham, (6 copies) one stamped 6 Jul 1977. Letter from RM to The Editors, 'Science', the American Association for the Advancement of Science, Washington, USA, re enclosing a note for publication (see above), 29 Jun 1977. Postcard from Philip H Abelson, Ed., 'Science', re response to 'technical comments', 21 Jul 1977. Letter from RM to Dr Abelson, Ed., 'Science', re query over response to previous letter, 24 Oct 1977. Letter to RM from Caitilin Gordon, Assist. Ed. of' 'Science', re Markham's letter and comments (paper, see above) on R A Schachar's "The Pincushion Grid Illusion", which they were not able to publish but sent on to Schachar, 1 Nov 1977. 1 transparency, 2 photocopies and 6 prints of Fig. 1 mentioned in Markham's letter, from the cover of Science No. 4237?

Offprint (Clarendon Press, Oxford, 1954).

; Author: Watts, Isaac; Publication Place: London; Publisher: C Cooke

; Author: Darwin, Charles Robert; Publication Place: London; Publisher: John Murray

'The Preparation of Tulip Bulbs for Forcing' by AD Hall

Papers, notes and publicity material

9pp typescript fair copy.