רביע (מכשיר)
הערות שוליים

1 2  Quadrant - Meaning and Uses, Unacademy (באנגלית אמריקאית)
↑  Witzel, Michael (2019). "Beyond the Flight of the Falcon".  In Thapar, Romila (ed.). Which of Us are Aryans?: Rethinking the Concept of Our Origins. Aleph. p. 11. ISBN 978-93-88292-38-2. Incidentally, the Indo-Aryan loanwords in Mitanni confirm the date of the Rig Veda for ca. 1200–1000 BCE. The Rig Veda is a late Bronze age text, thus from before 1000 BCE. However, the Mitanni words have a form of Indo-Aryan that is slightly older than that ... Clearly the Rig Veda cannot be older than ca. 1400, and taking into account a period needed for linguistic change, it may not be much older than ca. 1200 BCE.
↑  G. V. Raghava Rau, Scripture of the Heavens: The Eye of the Heavens, Ananda Press, 1949, עמ' 9+. (באנגלית)
↑  University of Calcutta Dept of Science, Journal of the Department of Science, 1924, עמ' 57. (באנגלית)
1 2  Silke Ackermann and Robert van Gent, Quadrant, Epact: Scientific Instruments of Medieval and Renaissance Europe, Museum of the History of Science.
1 2  Henry C. King, The History of the Telescope, Courier Corporation, 2003-01-01, עמ' 7-10, ISBN 978-0-486-43265-6. (באנגלית)
1 2  David A. King, Astronomical Instruments in the Islamic World, Dordrecht: Springer Netherlands, 2008, עמ' 273–276, ISBN 978-1-4020-4425-0. (באנגלית)
1 2  J J O'Connor and E F Robertson, Archbishops of St Andrews (1472–1689), Oxford Dictionary of National Biography, Oxford University Press, 2007
↑  A. A. Locci, Israel's Quadrant: Weeping, Laughing, and the Measures of the Stars, ASP Conference Series 441, 2011-06-01, עמ' 393
↑  The Astrolabe Quadrant, web.archive.org, ‏2018-07-21
↑  Olaf Pedersen, Early physics and astronomy: a historical introduction, Rev. ed, Cambridge [England] ; New York, NY, USA: Cambridge University Press, 1993, עמ' 226, ISBN 978-0-521-40340-5
↑  Peter Philomena of Dacia,also known as Petrus Dacus, Petrus Danus, Peter Nightingale | Encyclopedia.com, www.encyclopedia.com
↑  Lindberg, David C., ed. (1988). Science in the Middle Ages. Chicago, Ill. [u.a.]: Univ. of Chicago Press. ISBN 0226482332.
↑  "Quadrant". Department of Mathematics. University of Singapore. אורכב מ-המקור ב-2018-10-06.
↑  | National Museum of American History, americanhistory.si.edu
↑  Gerard L'Estrange Turner, Antique scientific instruments, 1. publ, Poole: Blandford Press, 1980, Blandford colour series, ISBN 978-0-7137-1068-7
↑  JOHN DAVIS, A MEDIEVAL GUNTER’S QUADRANT?, BSS Bulletin 23(iii), September 2011
↑  Julian Wilson, The earliest dated English scientific instrument., 2023
↑  "14th century timepiece unearthed in Qld farm shed". ABC News (בAustralian English). 2011-11-09. נבדק ב-2024-04-11.
↑  JOHN DAVIS, THE ZUTPHEN QUADRANT A Very Early Equal-Hour Instrument Excavated in The Netherlands, BSS Bulletin Volume 26(i), March 2014
↑  H.A.C. Fermin; D. Kastelein; M. Groothedde, 2013,, Het Zutphense kwadrant, https://doi.org/10.17026/dans-xyp-9pzw
↑  Toke Knudsen, Bridging the Gap Between Theory and Practice: Astronomical Instruments - A Quadrant | Mathematical Association of America, maa.org
1 2  W. E. May, A history of marine navigation, 1st American ed., New York: Norton, 1973, ISBN 978-0-393-03140-9
↑  John Louis Emil Dreyer, Tycho Brahe: A Picture of Scientific Life and Work in the Sixteenth Century, Cambridge: Cambridge University Press, 2014, Cambridge Library Collection - Astronomy, ISBN 978-1-108-06871-0
↑  Silke Ackermann, John Cherry, Richard II, John Holland and Three Medieval Quadrants, Annals of Science 56, 1999-01, עמ' 3–23 doi: 10.1080/000337999296508