Biographical Memoir of Count C. L. Berthollet. 5 
members of the Conservative Senate, and each of them was af- 
terwards provided with a senatorerie. 
When the French throne was re-occupied by its legitimate 
Sovereign in 1814, Louis XVIII. appointed Berthollet a mem- 
ber of the Chamber of Peers ; and, from attachment, no doubt, 
to the Bourbon Family, he took no part in the Chamber which 
Bonaparte had organised, after his return from Elba. 
A short time after he returned from Egypt, M. Berthollet took 
up his residence at Arcueil, a village about three miles south of 
Paris, where he pursued, in peaceful seclusion, those fine re- 
searches which adorned the close of his philosophical career. 
The results of these labours were given in his w Recherches 
sur les Lois de VAffinitef which appeared in 1801, and in his 
u Essai de Statique CMmiquef which was published in 1803, 
m 2 vols. 8vo *. 
While our author was thus extending the boundaries of che- 
mistry, by his own immediate labours, his rank in society, and 
his means of liberality, enabled him to become an active patron 
of scientific men. At the village of Arcueil, distinguished as 
the residence of that illustrious individual the Marquis Laplace, 
Berthollet established, in 1806, the Society of Arcueil , which 
met in his own house, where he formed a cabinet of physical 
instruments for the use of its members. This Society consisted 
of the Marquis Laplace, Count Berthollet, M. Biot, M. Hum- 
boldt, M. Thenard, M. Decandolle, M. Collet-Descostils, A. B. 
Berthollet, and Malus. They have published three volumes of 
their Memoirs, entitled “ Memoires de Physique et de Chimie 
de la Societe d? Arcueil f the first of which appeared in 1807, the 
second in 1809, and the third in 1817. At the meetings of this 
Society, which took place every fifteen days, new and interesting 
experiments were repeated, memoirs upon different subjects were 
read by the members, and each of them was charged with the per- 
usal of several journals or works, connected with the particular 
* Besides the works now mentioned, Berthollet translated “ Kir wan's Essay on 
Phlogiston” and added notes, in which he controverted the opinions of the English 
chemist. He was the author also of a preliminary dissertation and notes, which ac- 
companied RifFault’s translation of 44 Dr Thomson's System of Chemistry which 
appeared at Paris in 1808. 
