- For example, those in Waugh A.E. Sundials: Their Theory and Construction New York 1973
- Fuller , A.W. 1957 . Universal Rectilinear Dials . Mathematical Gazette , 41 : 9 – 24 .
- Bennett , J.A. 1987 . The Divided Circle Oxford H. Michel, Scientific Instruments in Art and History (London, 1967), gives a colour reproduction of a fine torquetum by Erasmus Habermel, c. 1600.
- Mills , H.R. 1978 . Positional Astronomy and Astro-Navigation Made Easy New York W. M. Smart, Textbook on Spherical Astronomy, 6th edn (Cambridge, 1977).
- Tables of Computed Altitude and Azimuth US Hydrographic Publication no. 214. Each volume covers 10° of latitude.
- Mills . 1978 . Positional Astronomy and Astro-Navigation Made Easy New York
- Mills , H.R. 1978 . Positional Astronomy and Astro-Navigation Made Easy New York
- Higgins , K. 1953 . The Classification of Sundials . Annals of Science , 9 : 342 – 348 .
- de Celles , Bedos . 1760 . La Gnomonique Pratique Paris and 1774); R. R. J. Rohr, Sundials: History, Theory and Practice (Toronto, 1970).
- Kren , C. 1977 . The Traveller's Dial in the Middle Ages: The Chilinder . Technology and Culture , 18 : 419 – 435 .
- Turner , G.L'E. 1983 . Nineteenth-century Scientific Instruments 48 – 48 . London plt. opposite
- Moore , J. 1994 . Ring Dials . Bulletin of the British Sundial Society , : 11 – 14 .
- Fuller . 1957 . Universal Rectilinear Dials . Mathematical Gazette , 41 : 9 – 24 . D. J. Price, ‘The “Little Ship of Venice”: A Middle English Instrument Tract’, Journal for the History of Medicine and Allied Sciences, 15 (1960), 399–407; J. Kragten, The Little Ship of Venice (Eindhoven, 1989).
- Fuller . 1957 . Universal Rectilinear Dials . Mathematical Gazette , 41 : 9 – 24 .
- Waugh . 1973 . Sundials: Their Theory and Construction New York Mills (note 4); F. W. Sawyer III, ‘A Universal Nomographic Sundial’, Bulletin of the British Sundial Society, no. 3 (1994), 14–17.
- Stebbins , F.A. 1958 . A Roman Sun-dial . Journal of the Royal Astronomical Society of Canada , 52 : 250 – 254 . J. V. Field, ‘Some Roman and Byzantine Portable Sundials and the London Sundial-Calendar’, in History of Technology, XII, edited by G. Hollister-Short and F. James (London, 1990), 103–35.
- Gunther , R.T. 1923 . Early Science in Oxford, II 122 – 122 . Oxford
- Bodleian Library Oxford MS Ashmole no. 1522, f. 181v. Before ad 1350.
Annals of Science
Volume 53, 1996 - Issue 1