# Parcieux

, or rather Deparcieux (Anthony), an
able mathematician, was born in 1703, at a hamlet near
Nismes, of industrious but poor parents, who were unable
to give him education; he soon, however, found a patron,
who placed him in the college at Lyons, where he made
astonishing progress in mathematics. On his arrival at
Paris, he was obliged to accept of humble employment
from the mathematical instrument makers, until his works
brought him into notice. These were, 1. “Table astronomiques,” 1740, 4to. 2. “Traite” de trigonometric rectiligne et spherique, avec un trait6 de gnomonique et des
tables de logarithmes,“1741, 4to. 3.” Essai sur les probabilites de la dnre de la vie humame,“1746, 4to. 4.” Reponse aux objections contrtr ce livre,“1746, 4to. 5.” Additions a I’essai, c.“1760, 4to. 6.” Memoires sur
la possibility et la facilit^ d‘amener aiipres de PEstrapade,
a Paris, les eaux de la riviere d’Yvette,“1763, 4to, reprinted, with additions, in 1777. It was always Deparcieux’s object to turn his knowledge of mathematics to
practical purposes, and in the memoirs of the academy of
sciences are many excellent papers which he contributed
with this view. He also introduced some ingenious improvements in machinery. He was censor- royal and member of the academy of sciences at Paris, and of those of
Berlin, Stockholm, Metz, Lyons, and Montpelher. He
died at Paris Sept. 2, 1768, aged sixty-five. He had a
nephew of the same name, born in 1753, who was educated at the college of Navarre at Paris, where he studied
mathematics and philosophy, and at the age of twentyfour gave public lectures. In 177y he began a course of
experimental philosophy, in the military school of Brienne;
after which, he occupied the philosophical professorship
at the Lyceum in Paris, where he died June 23, 1799, in
a state bordering on indigence. He wrote a” Traité elementaire de Mathematiques,“for the use of students;
| ”Traite* des annuites, ou des rentes a terme,“1781, 4to” Dissertation snr le moyen d‘elever l’eau par la rotation
d’une curde verticale sans fin,“Amst. 1782, 8vo” Dissertation sur ies globes areostatiques,“Paris, 1783, 8vo.
He left also some unfinished works; and a” Cours complet
de physique et de chimie," was in the press when he died. ^{1}

^{1}Biog. Univ. art. Deparcieux.