JOHANNES DE [Joni.' IIOLYWOOD] SACRO BOSCO (d. 1244 or 1256) , astronomical author, studied at
See also:Oxford and was afterwards
See also:professor of
See also:mathematics at the university of
See also:Paris . He wrote a
See also:treatise on spherical astronomy, Tractatus de sphaera, first printed at
See also:Ferrara in 1472 . This was the second astronomical
See also:work to be printed . Although recording no advance on the Arabian commentaries on
See also:Ptolemy, it gained a
See also:great reputation; twenty-four
See also:editions appeared before 1500, and at least
See also:forty between 1 500 and 1647, in which
See also:year the last edition was published, at
See also: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
See also:calendar, and suggests a remedy which is nearly the same as that actually used under
See also:Gregory XIII. three
See also:hundred and fifty years later . He also wrote Algorismus or De arte numerandi, printed in 1490 (?), in 1517 (Vienna), 1521 (
See also:Cracow), 1523 (Venice) ; De astrolabio and Breviarum
See also:juris .
SACRISTY (through Fr. sacrist-le, from med. Lat. sa...
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