See also:British astronomer, was
See also:born at . Alberbury,
See also:Shropshire, on the 29th of
See also:February 18o8 . At the age of eighteen he was enrolled as a
See also:sizar at St
See also:College, Cambridge, whence he graduated in 183o as
See also:fourth wrangler . In 1832 he was elected
See also:fellow of his college, and in the following
See also:year he was ordained, and became
See also:master of a private school at Stockwell . From 1834 to 1862 i
See also:Report of the Royal Commission on Penal Servitude (1878–1879). he was headmaster of Clapham grammar school . He then retired to
See also:Freshwater, in the Isle of
See also:Wight, and took an active PRIVAS, a
See also:town of south-eastern France, capital of the depart-
See also:interest in the affairs of the Royal Astronomical Society, of which he became honorary secretary in 1862 and
See also:president in 1866 . His career as a professional astronomer began in 187o, when he was elected Savilian
See also:professor of astronomy at
See also:Oxford . At his
See also:request the university determined to erect a
See also:telescope for the instruction of his class and for purposes of
See also:research, a
See also:scheme which, in consequence of
See also:Warren de la Rue's munificent
See also:gift of
See also:instruments from his private
See also:observatory at Cranford,
See also:expanded into the
See also:establishment of the new university observatory . By De la Rue's advice, Pritchard began his career there with a determination of the
See also:libration of the
See also:moon, or the
See also:nutation of its
See also:axis . In 1882 Pritchard commenced a systematic study of stellar photometry . For this purpose he employed an instrument known as the "
See also:wedge photometer " (see PHOTOMETRY,
See also:CELESTIAL, and Mem . R.A.S. xlvii .
353), with which he measured the relative brightness of 2784 stars between the
See also:Pole and about —ro° declination . The results were published in 1885 in his Uranometria Nova Oxoniensis, and their importance was recognized by the bestowal in 1886 upon him, conjointly with Professor Pickering, of the Royal Astronomical Society's gold medal . He now resolved to try the experiment of applying photography to the determination of stellar
See also:parallax . With the
See also:object of testing the capabilities of the method, he took for his first
See also:essay the well-known
See also:star 61 Cygni, and his results agreed so well with those previously attained that he undertook the systematic measurement of the parallaxes of second-magnitude stars, and published the outcome in the third and fourth volumes of the Publications of the Oxford University Observatory . Although some lurking errors impaired the authority of the concluded parallaxes this
See also:work ranks as a valuable contribution to astronomy, since it showed the possibility of employing photography in such delicate investigations . When the
See also:great scheme of an
See also:international survey of the heavens was projected, the zone between 25° and 310 north declination was allotted to him, and at the
See also:time of his
See also:death some progress had been made in recording its included stars . Pritchard became a fellow of New College, Oxford, in 1883, and an honorary fellow of St John's College, Cambridge, in 1886 . He was elected a fellow of the Royal Society in 1840, and in 1892 was awarded one of the royal medals for his work on photometry and stellar parallax . He died on the 28th of May 1893 . See Proc .
See also:Roy .
See also:Soc. liv .
See also:Month . Notices, Roy .
See also:Asir . Soc. liv . 198; W . E . Plummer, Observatory, xvi . 256 (portrait); Astr. and
See also:Astrophysics, xii . 592; J .
See also:Foster, Oxford Men and their Colleges, p . 206; Hist .
See also:Register of the Univ. of Oxford, p .
95; The Times (May 3o, 1893); C . J .
See also:Robinson's Register of
See also:Merchant Taylors' School, ii . 21o;
See also:Charles Pritchard, D.D.,
See also:Memoirs of his
See also:Life, by Ada Pritchard (
See also:London, 1897) .
PRISON (derived through the Fr. from the Lat. prehe...
HANNAH PRITCHARD (1711-1768)
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