Browse the Turing Digital Archive

Folder inscribed, ‘Morphogens. Turing I’. With MS note by Gandy, ‘ This contains consecutive pieces which were not incorporated by Hoskin and Richards in their paper’. Includes, among other unidentified pages:-

• ‘Outline of the development of the daisy’. Includes sections on ‘Considerations governing the choice of parameter’ and ‘Early stages in pattern formation’. Numbered by R.O. Gandy
• 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 ?’
• ‘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.