source cites Addey's work on astrological time twins (people who are born at the same moment and should therefore have similar traits) as "perhaps the most extensive survey of time twins made by an astrologer." The authors describe their own independent study that considered Addey's criteria of timing between time twins. Another source, a standard college textbook on the philosophy of science, provides a chapter with descriptions and graphic illustrations from one of Addey's studies as an example of astrological research. The study extended the statistical research of Michel Gauquelin by applying harmonic analysis to the data. "Addey found that, as the planetary position at birth changed, the personality traits (determined from biographies) varied smoothly as in a spectrum... The spectrum repeats itself every quadrant." However, "As Addey points out, planets with variable meanings are quite contrary to what astrology predicts." The authors regret that "sadly, this intriguing work was cut short by Addey's untimely death." Writings Addey wrote numerous articles – mainly for the Astrological Journal, many of which are now available in his Harmonic Anthology (1976, new edition, AFA, 2011) and Selected Writings (AFA, 1976); his main work was Harmonics in Astrology (1975, latest edition, Eyebright Books, 2010). He was some way through a further book, A New Study of Astrology when he was taken ill in the winter of 1982 – this was completed by Charles Harvey and Tim Addey some years later (Urania Trust, 1996). The latter work included as appendices two small monographs – Astrology Reborn (originally published in 1972) and The Discrimination of Birthtypes (1974). References External links John Addey at solsticepoint.com. The Astrological Association of Great Britain John Addey – short biography and 3 articles 1920 births 1982 deaths English astrologers English astrological writers People from Barnsley Writers from London People associated with the Friends' Ambulance Unit 20th-century English male writers 20th-century Quakers