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1. Segregation in partially diploid and partially tetrapoid species in Nicotiana - Arranged by Dr. F.G. Brieger. 2. The genetics of intellect - Arranged by Dr. C.C. Hurst. 3. Colour varieties of the Mouse - Arranged by Dr. I.H. Grunberg and J.B.S. Haldane. Mutant types of Drosophila melanogaster - Arranged by Miss U. Philip. 4. Blood grouping - Arranged by Mr. P.K. Gorer. 5. Cytology of Orthopetra - Arranged by Mr. M.J.D. White. 6. Cytological observations of Drosophila and maize bearing on the theory of crossing over - Arranged by Dr. C.D. Darlington. 7. The influence of temperature on chiasma frequency and crossing-over - Arranged by Mr. M.J.D. White.

1. Annual business meeting 2. Demonstration in the Department of forestry. 3. Demonstration in the Department of comparative anatomy. Includes candidates selected under Rule 6 - Dr. H. Donald, Dr. A Greenwood, Dr. A. Haddow, Dr. T.E. Nichols, Mr. N.W. Simmonds. Candidates previously nominated as temporary members under Rule 9 - Dr. G.P. Carson, Mr. J.L. Crosby, Miss P.M. Priestly.

1. Nature of lethals in Drosophila melanogaster - 1. Experimental - Arranged by D.G. Catcheside.; 2. Theoretical - Arranged by D.E. Lea. 2. Genetic aspects of heterokaryosis - G. Pontecorvo. 3. Meiosis in some Asomycetes - Arranged by J.B.S. Haldane and H.L.K. Whitehouse. 4. Experiments imitating tumour development - Arranged by P.T. Thomas. 5. Mutation-rate of Retinoblastoma in Man - Arranged by U. Philip and A. Sorsby.

Genetical Relations of Plants and Animals to their Pests and Diseases, including: 1. J. Hammond - Constitution in Cattle in relation to Disease 2. M.S. Pease - Observations on heritable Disease in Poultry 3. J.G. Carr - Heritable Susceptibility of Poultry to Cancer Virus 4. W. Black - Inheritance of Blight Resistance in Potatoes 5. G. Cockerham - Genetical Aspects of Resistance to Potato Viruses 6. T.J. Jenkin - Disease and Pest Problems at the Welsh Plant Breeding Station Includes call for papers

Papers presented by: 1. P.S. Nutman: Inheritance in red clover of resistance to infection by nodule bacteria. 2. R.A. Fisher: The formal analysis of linkage in tetrasomic inheritance. 3. M.J.D. White: The chromosome cycle and anomalous spermatogenesis of the paedogenetic midge, Miastor. Includes candidates selected in accordance with Rule 6, and candidates previously nominated under Rule 9.

1. Variation in birds - Arranged by Mr. P.R. Lowe and Mr. N.B. Kinnear, including miscellaneous variations, some associated with locality; races occupying contigous areas; finches of the Galapagos Islands; colour pattern; variation in secondary sexual characters. 2. Variation in mammals - Arranged by Mr. M.A.C. Hinton. 3. Mollusca - Arranged by Mr. G.C. Robson.

1. Oenothera. 2. Rice. 3. X-ray derivatives. 4. Phalaridae. 5. Cicer. 6. Gossypium. 7. Malvaceae. 8. Sida. 9. Hibiscus. 10. Sidalcea. Two copies of programme.

Ongoing series from No1

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