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yeeceived the rudiments of his education at Sedan, whence he 
went to Bale, where he was admitted doétor in medicine in 
1637. Not fatisfied with his acquirements, he vifited fe- 
veral of the univerfitics in France and Germany. At length 
he went to Leyden; and in 1658 he was appointed to the 
chair of profeffor in medicine in that univerfity, which had 
become vacant by the death of Albert Kyper. His cha- 
raéer here, both as a teacher and pra&titioner, foon became 
{o extended, that as there were few cafes in medicine that 
were difficult in which he was not confulted, fo there were 
none of the claffes fo numeroufly attended as that over which 
he prefided. In 1670 he was made retor of the univerfity, 
and two years after he died, in the 58th year of his age. 
He attended with his pupils the fick wards of the hofpital, 
zxplained to them the nature of the difeales with which the 
patients were afflifted ; and he opened before them fuch of 
the patients as died, and fhewed them the changes which bad 
taken place in the organs that were the feat of the difeafes. 
He had the merit of being one of the moft ftrenuous de- 
fenders of the doétrine of the circulation of the blood, as 
deferibed by Dr. Harvey, and which, we know, at firft met 
with much oppofition, He alfo made confiderable advances 
in the {tudy of chemiftry, to which he was much attached. 
He was, however, too much attached to the humoral patho- 
logy, attributing all difeafes to fome fault in the blood or 
juices, which he fuppofed, in moft cales, were vitiated by 
a redundancy of aad. His remedies, therzfore, were prin- 
cipaily taken from the alkalies, a do&rine which by degrees 
became general over Europe. Notwithftanding his nume- 
rous avocations, he found time to write a confiderable num- 
ber of treatifes on various parts of medicine, though few of 
A< 
colle@ed, and form a large volume in folio. ¢ Opera 
medica, tam hattenus inedita, quam variis Formis et Locis 
edita, nunc vero certo Ordine difpofita, et in unum Volumen 
redu&a,” Amftel. 1679. It has been feveral times re- 
printed. Tor the titles of the feveral treatifes, {ec Haller’s 
Bib. Med. Eloy Di&. H:ft. 
Dusors, or, a3 he is more commonly cal'ed, JamEs 
SyLvius, a learned and voluminous writer of the 16th cen- 
tury, was fo artached to the ancients, particularly to Hip- 
pocrates and Galen, the greater part of whofe works he 
tran{lated and edited, that he conftantly oppofed every thing 
that wag novel in do@rine or prattice. Idence he kept upa 
conftant warfare with Vefalius, his cotemporary, whofe 
difcoveries and improvements in 2natomy, although obvious 
to the fenfes, he refufed to admit. Sylvius was born in the 
diocefe of Amiens, in 1478, and was educated under his 
brotber Francis, who had fo far diftisguifhed himfeif by his 
knowledge of the Greek and Latin languages, that he was 
promoted to the office of principal of the college of Toutney. 
After remaining feveral years with his brother, and having 
been initiated in the knowledge of medicine, which he alfo 
taught to younger ftudents, to obtain what was neceflary 
for his maintenance, he went to Montpellier in 1529, where, 
by the favour of the univerfity, and in confideration of his 
great learuing and his age, he was immediately received 
them were publithed in his life-time. They have been fince 
E o 2 3 s 
bachelor, and the year following doétor in medicine, He 
then returned to Paris, and was appointed profeflor in medi. 
cine; a poft which he filled with honour to himfelf_and ad- 
vantage to his pupils, to the time of hxs_df:ath, wbxch hap- 
pened on the 13th of January, 1555, mn the 76th year of 
his age. : 
His works, which were numerous and much efteemed in 
his time, were colle¢ted by Rene Moreau, and publifhed in 
one volume folio, at Geneva, in 1635, under the title of 
¢ Opera medica, jam demum in fex Partes digefta, cafti- 
gata, ¢t cum Indicibus neceflariis infiru&a,” For the titles 
DUB 
of the particular treatifes, with the timee and order of theiy 
publication, the reader is referred to Haller’s Bib, Med, 
As Dubois had {uffered much, for want of being abie to 
procure proper aids for his ftudies in the younger part of Ing 
life, and he was old before he attained to 2ffluence, it is prg. 
bable he could-not then give up the habits of parfimony 
which his indigence had cbliged him to adopt, Some wit 
has lathed that vice with the following : 
“ Sylvius hic fitus eft, gratis gui nil dedit unquam, 
Mortuus, et gratis quod legis ifta, dolet,” 
Haller Bib, Med. Eloy Dié. Hift. 
Dusois, Simon, a painter of portraits, battles,” and 
eattle, was born at Antwerp ; and having become rich by 
his profeffion, diedin 1708. 
Dusors Lake, in Geggraphy. See Lake Du Bors. 
DUBOS, Cuarres Francis, in Biography, wasborn in 
the year 1661, in the diocefle of St. Flour in Auvergne. He 
was {ent to Paris for education, where, after having gone 
throuzh a courfe of claffical learning and philofophy, he de- 
voted himfelf to the ftudy of theology, and took his degreesin 
the college of the Sorbonne. Many offers of preferment were 
propofed to him, at length he clofed with one from the 
bifhop of Lugon, who appointed him principal archdeacon 
of his church, and cenfidential grand vicar. In this fitua. 
tion, he obtained the friendthip of the prelate, becamean 
inmate in his houfe, and entrufted by him with the moft 
important of his concerns. After the death of his worthy 
patron, he was eletted to a deanery under very honourable 
circumftances. This office he held till the 64th yearof his 
age, when he died. He lived honoured and efteemed by all 
ranks, and his death was lamented by his friends, to whom 
he was endeared by the tendereft tie, and by the poor, who 
had experienced in him a kind and altive benefactor.  Dubos 
refumed the celebrated ¢¢ Lugon conferences,” which, after 
he publication of five volumcs bad been fulpended about ten 
years. '1'o thefe headded 17 ochersin 12mo., and left ma- 
terials for 15 more. Ha was alfo the auther of ¢ A fketch 
of the life of M. Barillon, bifhop of Lugon,”” publithed in 
1700. “Moreri. 
Dusos, Joun BartisT, abbot of Refons, was born in 
1650 at Beauvois, where he was educated for the church, 
but fome difappointmeuts caufed him to turn his attention to 
the civil law, hiftory, and politics. In 1695, he publifhed 
his ¢ Hiftory of the Four Gordians proved and illultrated 
by Medals,”” in which he attempted to prove the exitlence of 
a fourth of this imperial family, in addition to the three 
ufually reckoned. After this, he was employed in many 
foreign negociations. He came to England to perfuade the 
people to confent to a peace with France; for this purpole 
he publifhed a work, entitled ¢ The interefts of England ill 
underftood in the prefent War,”” 1704, which obtained a 
very limited circulation, and made fcarcely any impreffion 
on thofe for whom it was intended. The only thing re- 
markable in it, is a prediction of the future feparation of the 
North American colonies. In 1709, he publithed a ¢ Hif- 
tory of the League of Cambray againft the Venetian repub- 
lic,” which wasintended to ferve the caufe of peace, by 
affording a friking example of theill fuccels of a league of 
many powers again{t an individual flate, Dubos was em- 
ployed in the negociations at Utrecht, Baden, and Rad- 
{tadt, and his labours were rewarded by church preferment. 
He was an agent in the hands of the duke of Orleans, an 
cardinal Dubois, but never aced even for thefe a difhonour- 
able part, though he ufually gave them fatisfaction. Wea- 
ried, perhaps, of a political life, he became diftinguifhed 
for his zeal in polite literature and the fine arts, and in 1719, 
pubiithed