The Papers of Alan Mathison Turing

The folder has a manuscript note by Gandy, 'This contains consecutive pieces which were not incorporated by Hoskin and Richards in their paper'. The file includes, among other unidentified pages:-

- 'Outline of the development of the daisy', including sections on 'Considerations governing the choice of parameter' and 'Early stages in pattern formation'. The pages have been numbered by R. O. Gandy;

- a worked example of the theory in 'Morphogen theory of phyllotaxis II', showing how orthogonal eigenfunctions can be chosen for a linear model of diffusion between four discrete cells arranged as three satellites around a central cell;

- '13 Stationary waves in continuous tissue and abstract space';

- 'Forced waves';

- 'discarded FIRSTART values';

- '4. The equations applied to a plane';

- 'Effect of quadratic terms';

- Substantial set of drafts and calculations, with [? Hoskin's] separate page heading, 'Stability and approximations';

- 'Hex stability with different values of gamma';

- 'Damping due to the J term';

- draft of 'solvable and unsolvable problems' ('Penguin Science News' 31, 1954);

- 'Lattice solutions and their stability';

- 'Fig X': a nomogram.