Unpublished appendix, 'Detailed calculation of the advance of perihelion of a planet moving in the equatorial plane, on the basis of Whitehead's theory of gravitation' by C B Rayner Rayner presents equations relating to the 'orbits of test-particles in the equatorial plane' and 'the advance of perihelion of planetary orbits. Annotations in pencil and ink throughout. Note on front reads 'For deposit in the RS Archives'. Subject: Physics / Astronomy The affiliated paper was published in volume 232 of the Proceedings of the Royal Society A as 'The effects of rotation of the central body on its planetary orbits, after the Whitehead theory of gravitation'. [1955]