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Specimens in flask and test tubes including first recorded crystalline form of a plant anthocyanin pigment (malvidin 3-gentiobioside); Cyanidin, Antirrhinum chloride - yellow and red hydrates; Delphinidin chloride, Pelargonidin chloride, Hirsutin chloride; also Mendel seal imprint

Papers presented by: 1. H. Gruneberg - "A compensated skeletal anomaly in the mouse". 2. D. Michie - "A new linkage in the house mouse involving the sex chromosome". 3. F.W. Robertson - "Chromosome analysis of selected strains of Drosophila" 4. C.H. Waddington - "Selection of the genetic basis of an acquired character". 5. L.M. Hemmons, G. Pontecorvo and A.W.S. Bufton - "Perithecium analysis in Aspergillus nidulans" 6. G.J. Dowrick - "The origin of new varieties of the garden chrysanthemum". 7. D. Lewis and L.K. Crowe - "Male sterility as an outbreeding mechanism in Origanum vulgare". 8. J.L. Fyfe - "Natural cross-breeding in winter beans". Two copies of programme.

Papers presented by: 1. W. Jackson - "What is Geranium anemonefolium?". 2. H.G. Baker - "Cytotaxonomic studies in the Plumbaginaceae". 3. I. Manton - "The present programme of new work on the cytology of the Pteridophyta". 4. M.G. Shivas - "The present state of work in Asplenium and Polypodium". 5. S. Walker - "The Dryopteris spinulosa complex in Europe and America". 6. E.C.R. Reeve - "Expression of genes affecting a quantitative character, in two different environments". 7. G. Pontecorvo and J.A. Roper - "Genetic analysis based on mitotic crossing-over in heterozygous diploids of Aspergillus nidulans". 8. W.D. Kaplan - "The influence of Minutes upon somatic crossing-over in Drosophila". Includes abstracts. Two copies of programme.

Papers presented by: 1. S.H. Revell - "Evidence for an exchange hypothesis for 'chromatid' aberrations induced by X-rays". 2. C. Quadlings and B.A.D. Stocker - "Differentiation of cells within clones of Salmonella: spontaneous phenotypic variation in respect of motility". 3. J.B.S. Haldane - "A method for the detection of autosomal lethals induced by high frequency radiation in mice". 4. G. Pontecorvo and J.A. Roper - "Resolving power of genetic analysis in terms of DNA". 5. B. Woolf - "Significance tests for heritabilities and analogous parameters estimated from variance components". 6. J.L. Crosby - "Homostyly in the Primrose - a progress report". 7. H. Spurway - "Fatherless families in Lebistes reticulatus". 8. U. Philip - "Primary sex ratios of the sea-weed fly Coelopa frigida (F.) and of the housemouse". 9. J.D.H. Reusch - "Effect of gamma irradiation on the affinities of Lolium perenne and Festuca pratensis". 10. M.E. Wallace - "Experimental evidence concerning 'affinity'". 11. E.C.R. Reeve - "The effects of selection and linkage on inbreeding progress". 12. Forbes W. Robertson - "Genetic correlation between body size and egg production in Drosophila melanogaster". 13. C.A. Clarke, R.B. McConnell and P.M. Sheppard - "The ABO blood groups and scretor status in duodenal ulcer".

Papers presented by: 1. K.G. Bateman - "Experiments on genetic assimilation". 2. Etta Kafer and J.D. Roper - "Acriflavine resistant mutants of Aspergillus nidulans". 3. B.M. Slizynski - "Cytological analysis of translocations in the mouse". 4. E.M. Pantelouris - "Host effect on the size of imagos developing from transplanted ovaries (Drosophila melanogaster)". 5. S.W. Glover - "The gentic control of methionine synthesis in Salmonella". 6. H. Kacser - "Function and organisation of gentic material". 7. D.S. Falconer - "Litter size in mice - studies on selection, inbreeding, and crossing". 8. K. Nordback and C. Auerbach - "'Recovery' from X-ray mutation". 9. R. Osborne - "An improved method of selective breeding in poultry". 10. G.R. Knight, Alan Robertson and C.H. Waddington - "The production of sexual isolation in Drosophila by selection". 11. E.C.R. Reeve and A.O. Tantawy - "An experimental study of the effects of inbreeding at different rates on size in Drosophila melanogaster". 12. G.W.P. Dawson - "Blood group gene frequencies in Ireland". 13. E. Calef - "Functional relationships between three adinineless mutants in Asperigillus nidulans". 14. M. Fischberg - "The possible effect of outcrossing on the evolution of chromosomes numbers in animals". 15. J. Maynard - "Acclimatisation to high temperatures in inbred and outbred Drosophila subobscura". 16. Hans Gruneberg - "The development of vestigial-tail in the mouse".

Papers presented by: 1. D. Davidson - "Comparative sensitivity of mitotic stages". 2. H.B.D. Kettlewell - Film: "The contribution of industrial melanism in the Lepidoptera to our knowledge of Evolution." (Commentary by Dr. E.B. Ford). 3. A.C. Allison - "Metabolic and sensory polymorphisms". 4. C.E. Ford, R.H. Mole and J.L. Hamerton - "The chromosomes of some primary and transplanted tumours of the mouse". 5. S. Smith-White - "Variable pollen tetrads in the Styphelieae".

Papers presented by: 1. C.E. Ford and J.L. Hamerton - "Chromosome polymorphism in the common shrew". 2. B.M. Cattanach and R.G. Edwards - "The action of triethylene melamine (TEM) on the fertility of male mice". 3. D.G. Gilmour - "Maintenance of segregation of blood group genes during inbreeding in chicken". 4. J.V. Evans, H. Harris and F.L. Warren - "The distribution of haemoglobin and blood potassium types in British breeds of sheep". 5. J.W.B. King, J.V. Evans, H. Harris, and F.L. Warren - "The performance of sheep with differing haemoglobin and potassium blood types". 6. A.D. Bradshaw - "Phenotypic flexibility in plants". 7. J. Heslop-Harrison - "Induced male sterility in Silene". 8. P.W. Brian - "Reversal of genetic dwarfism in plants by gibberellic acid". 9. L.S. Penrose - "Genetics of anencephaly". 10. H. Harris and E.B. Robson - "Hypophosphatasia. Excretion of ethanolamine phosphate in clinically normal relatives". 11. W. Howell Evans and F.D. Kitchin - "Taste threshold for P.T.C. in thyroid disease.".

Papers presented by: 1. S.D. Lawler and R. Marshall - "ABH secretor and Lewis characters in man". 2. H. Lehmann, V. Patson and E. Ryan - "Familial low pseudocholinesterase". 3. E.A. Bevan - "Genetic change in diploid yeast". 4. D.G. Rowlans - "Self-fertility in the field bean (Vicia faba L.)". 5. G.R. Fraser - "Syndrome of deafness and goitre". 6. E. Glassman and H.K. Mitchell - "Maternal effect of ma-1+ on xanthine dehydrogenase of Drosophila melanogaster". 7. H.G. Callan and H.C. MacGregor - "The axes of lampbrush chromosomes and of their lateral loops". 8. First Mendel Lecture. "Mendel's Elemente in 1958," by Dr. G.W. Beadle. 9. J. Heslop-Harrison - "Photoperiodic control of breeding system in Rottboellia exaltata". 10. J.L. Reissig - "Forward and back-mutation at the pyr3 locus of Neurospora".

Papers presented by: F.W. Robertson J. Maynard Smith and K.C. Sondhi C.H. Ockey O.J. Miller, U. Mittwoch and L.S. Penrose A.J. Bateman A.R. Selim and J.N. Hartshorne A. Plack H. Kalmus H. Grunberg R.C. Roberts F.G.H. Lupton D. Lewis J.L. Crosby Includes abstracts