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Encyclopedia Britannica



SACRO BOSCO, JOHANNES DE [Joni.' IIOLYWOOD] (d. 1244 or 1256)

This article appears in Volume V23, Page 988 of the Encyclopedia Britannica.

Encyclopedia Britannica - Main :: SAC-SAR
SACRO BOSCO, JOHANNES DE [Joni.' IIOLYWOOD] (d. 1244 or 1256) , astronomical author, studied at
Oxford
  and was afterwards professor of
mathematics
  at the university of Paris. He wrote a treatise on spherical astronomy, Tractatus de sphaera, first printed at Ferrara in 1472. This was the second astronomical
work
  to be printed. Although recording no advance on the Arabian commentaries on
Ptolemy
 , it gained a
great
  reputation; twenty-four
editions
  appeared before 1500, and at least
forty
  between 1 500 and 1647, in which year the last edition was published, at Leiden. About the year 1232 he wrote De anni ratione or De eomputo ecclesiastico (printed
editions
  at Paris in 1538 (?), 1550, 1572 and at Antwerp in 1547 and 1566), in which he points out the increasing error of the
Julian
  calendar, and suggests a remedy which is nearly the same as that actually used under Gregory XIII. three hundred and fifty years later.
He also wrote Algorismus or De arte numerandi, printed in 1490 (?), in 1517 (Vienna), 1521 (Cracow), 1523 (Venice) ; De astrolabio and Breviarum juris.


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