£ ft E G O R f. 
age. He was the author oF A Hi ft or y of the Franks, 
in ten books, containing the profane and ecclefiaftical 
liiftory of the Gauls and Franks, from the fir ft planting 
of Chriftianity among the Gaiiils by Photi.nus bifhop of 
Lyons, to the year ^951. Gregory was alfo the author 
of eight other books. Concerning Miracles, or the Lives 
of the Saints, in which hrs fimplicity and credulity are 
amply displayed, and a colleftion of fpiritnal romances 
is exhibited, fuit-ed only to the tafte of the moft fnper- 
ftitious times. The pieces above-mentioned are infer ted 
in the fecond volume of the Bibliotk. Pair. Some frag¬ 
ments of A Commentary on the Pfalms, by the fame 
author,! are preferved in the firft volume of father Ma- 
billon’s AnakEla. Among the different editions of Gre¬ 
gory’s works, the bed is that publifhed at Paris in 1699', 
entitled, S. Gregorii, Turonenfis , Epifcopi , Opera omnia , nec- 
fton FfedegetrU ScholaJHci Epitome, £3c. ex Editione Tkeodorici 
Ruinart, BenediSlini, folio. 
GREG'ORY of Rimini (in Latin Gregorius Arimneh- 
fis), one of the moft fubtile fchoolmen in the fourteenth 
century, born in the city whence he took his 1 fiirname, 
and became a monk of the order of the Hermits of St?. 
Auguftine. He was appointed principal profeffor in 
the convent at Rimini in 1351, and madO general of 
his order at Montpellier in 1357. He died at Vientia 
in the following year. He approached mbre nearly to 
the doririne of St. Anguftine refpefting free-will, than 
mod of the divines of his time, and hrongly oppofed 
thofe who aflerted that,, “by the almighty power of 
God, two contrary propofitions, concerning one and the 
fame thing, might be true at the fame time.” He was 
the author of, 1. Commentaries on the four Books of 
Sentences, folio. 2. Commentaries on the Epiftld of 
St. Paul, and on the Canonical Epiftle. of St. James. 
3. A Treatife on Ufury. 4. Sermons, See. 
GREG'ORY of St. Vincent, a refpeftable Flem- 
ifh geometrician, born at Bruges, in 1584. When he 
was twenty years of age, he became a member of the 
fociety of Jefus at Rome, and ftudied the mathematics 
under the learned Clavius. Afterwards lie became a 
profeffor of thofe faience's' himfelf, and acquired fitch 
high reputation, that his iiiftruftions- were defired by 
feveral princes. He was fent to Prague, at the requeft 
of the emperor Ferdinand II. and Philip II. king of 
Spain chofe him mathematical tutor to Ills IqpJ prince 
John of Audria. Father Gregory is highly lpoken of 
for his virtues, as'well as fkill in the fcieiices'. He died 
of an apoplexy at Ghent, in 1667, when about eighty- 
three years of age. He was a did'ufe and voluminous 
writer, but at the fame time an excellent geometrician. 
He publifhed, in Latin, three' learned 1 mathematical 
works, of which the principal, and that mod 1 generally 
known, is entitled, Opus Geometricum Quadrature Circuli, 
£3 Se&ionum Coni, decern Libris comprehenjum , 1647, in 2 vols. 
folio. Notwithdanding that he has not demonftrated in 
this work the quadrature of the circle, as he pretended 
to have done, his performance, neverthelefs, contains a 
number of truths and important difeoveries. 
GREG'ORY (John), a learned Ehglilh divine, born 
at Agmondefham, in Buckinghamfliire, in 1607. He 
early difeovered a ftrong inclination for learning, but 
his parents were in too redriCted- circurndanC.es-to give 
him a liberal education. They were fo much refpeft- 
ed, however, for their piety and integrity, thatTome of 
the gentry fent their foil to Chrift-church college, Ox¬ 
ford, in 1624, where he was placed under the tuition of 
Dr. George Morley, afterwards bifhop of Winchefter. 
In this fituationhe applied to-his ftudies with' thegreat- 
ed aifiduity, and foon made- an uncommon progrefs in 
learning. I11 1634, he publifhed a fecond edition, irf 
4to, of fir Thomas Ridley’s 1 View of the Civil and Ec¬ 
clefiaftical Law, with notes; by which he acquired 
much reputation, on account of'the.civil, hidorical, ec¬ 
clefiaftical, and ritual, learning, and the fkill in- ancient 
and modern languages, Oriental as well as European, 
VOL..IX. No-; 562.. 
13 
dlfplayed in it. When, ttr 1638, Dr. Ditppa was pro¬ 
moted to the fee of Chicliefter, he appointed Mr. Gre¬ 
gory his ddmeftie chaplain, and not long afterwards' col¬ 
lated' him to the prebend 1 in that church. Upon the 
tranfla’fi6n ; of that prelate to the bifhopric of S'alTffwjrj', 
in 1641, he gave a farther'proof of his regard for Mr. 
Gregory’s merits, by appointing him alfo a prebendary 
of his lietv fee. Iii 1646 he publifhed, Notes, and O'b- 
ferva'tioris' on fome Paffage's' of Scripture, 410. which 
were reprinted' at different period's, aft'd? afterwards trans¬ 
lated- into' Latin, and' rnferied in the Criiici Sacri. I'oV 
many' years hi had beeh, tlie fi'NM of in hereditary 
golit, which, in the year lad mentioned, attacked him 
in tire fto'macb, and ^proved fatal to him in the tTiif-ly- 
ninth year of his age. In' 165o', a colledtiori of tqaVncd 
tradts Was ptibliffred’ in ^to. under the title of Gregorii 
Pojihirriid, See. Mr. Gregory alfo left behind hint three 
tranflafions from the Greek into Latin, which in i'6S$ 
were publifhed at London, by Edvvard Byfhe, efq. ib 
his own name, in 4to. They coiifift' of 1. Palladicus ae 
Geniilus India, £3 Bra'c/tnidnnib'us. 2. S. ArribrofiUs de Mori- 
bus Brachnidnnorum, 3'. Anohymus de RracEmannibus. 
GREG'ORY (jamesf, one of the mdffeminent ma¬ 
thematicians of the feventeenth centiiry, the foil of the 
rev. Mr. John Gregory, minifter of D'ruinoafc, in Scot¬ 
land’, and 1 born £t Aberdeen, in 1638. His mother was 
the daughter of Mr. David Anderfon of Finz'augh, a 
gentleman who poffeffed a fing'ular turn for mathemati¬ 
cal and mechanical knowledge. This mathematical 
genius was hereditary in the family of the Anderfons, 
and from-that feenis to have been fraiifmitted to tjieir 
defeendants of the name of Gregory. The mother of 
Janies Gregory inherited the genius of her family ; and, 
observing in her fon a drong propeiifity to mathematics, 
die indmdled- him herfelf in the elements of that fcience . 
He received his education in the languages at the gram- 
mar-fcliool of Aberdeen, and went through the ufual 
courfe of academical dudies in the Marifchal college, 
with credit to hiV application arid, proficiency; liLit his 
greated pleafure was in philofophical refearches, into 
which a new door had lately been opened'by the key.of 
the mathematics. Galileo, ICepler, Des Cartes, &c. 
were the great mafters of this new method ; their works, 
therefore, became the principal ftud'y of young, Gregory^ 
who foOn began tb make improvements upon tlieir dif¬ 
eoveries in optics. In 1663, when only twenty-foiir 
years of age, he publifhed his Optica Proviota, feu abditg 
Radiorum Reflexorum £3 Refrattorum MyJI’eria, Geomctrice enu - 
cleata-, £ 3 c. 410. This work, which' announced the itil 
ventidit of tlie refietTing' ttlefcope, immediately at¬ 
tracted the notice of mathematicians, both at home and 
abroad^ who were foon convinced of its great' imporl 
tance to the fCiencds of optics and adrohomy. See the 
artidle Telescope. After coming, to London, Mr; 
Gregory was refoived to make the tour of Italy, which 
was then ede'emed the mart of mathematical., learning. 
As the univerfity of Padua was.at that time in high re¬ 
putation, he fixed his refidence' there;for"Tonie! years, 
and in 1667 publifhed at'that place, Vera Circuli Q Hy . 
perbola Quadratura, £ 3 c. 4to. In this work lie announced 
another of his difeoveries, that of an infinitely converg¬ 
ing ferie's for the areas of tlie y circle and hyperbola, by 
which tliey may be computed to any degree of exadc-: 
nefs. He fent home a copy of this work to his friend 
Mr. Collins, who communicated it to the Royal Socie¬ 
ty, where it met with th'e commendation of lord Broun- 
ker and Dr. Wallis. In 166S lie reprinted that treatife 
at Venice, with an anfwer to fiich objedfions as either 
had been, or fuel! as lie conceived might be, made 
againft it. This' anfwef was inferted in the preface to 
another piece, annexed to the former, and entitled, Geo-, 
rrtetria Pars Univerjalis, injerviens \Quar^titatum Curvahm 
Tranjrnutatibni & Mehfura, 4to. iii which' lie is allowed to 
have fli'ewn, for'file firft time, a metliod for the trail!-, 
mutation' of curves. Thefe works engaged the notice. 
