Considerations on the Necessity of Restoring the Chant of the Church of Rome in All Churches of the Empire

BERARD. Theory of the Equilibrium of Vaults, in-4. 1810. 6 fr.
BERNARD. New principles of hydraulics, in-4. 13 fr.
BERNOULLI (Johannis) Works, 4 vol. in-4°. 48 fr.
— And LEIBNIZ Philosophical and mathematical commerce, 2 vol. in-4. 24 fr.
— Essay on a new theory of ship construction, in-8. 3 fr.
BERNOULLI (Jacobi) Works, 2 vol. in-4. 36 fr.
— Art of Conjecture, in-4°. 21 fr.
— The same, translated into French by Vastel, in-4. 5 fr.
BERNOULLI (Danielis) Hydrodynamica, in-4°. 21 fr.
BERTHOLLET. Essay on chemical Statics, 1803, 2 vol. in-8°. 12 fr.
— Art of dyeing, new edit., 2 vol. in-8°. 12 f.
BERTHOUD, Mechanic for the Navy, Member of the national Institute of France and the Royal Society of London, Member of the Legion of Honor. Works on Horology clockmaking.

1°. The art of operating and regulating Pendulums and Watches, fourth edition, augmented by a plate, and the method of tracing the meridian line of mean time. Paris, 1811, v. in-12 with 5 plates. 2 fr. 50 c.
In this small work intended for persons who have no knowledge of horology, one finds a notion of the mechanism of a pendulum and a watch; the causes of variations in watches; the rules to follow to govern one's own watches and pendulums; tables for the method of tracing a meridian; a watch face indicating the equation of time, etc.

2°. Essay on Horology, in which one treats of this art relative to civil use, to astronomy and to navigation, followed by clarifications on the invention, the theory, the construction and the tests of new machines proposed in France for the determination of longitudes at sea by the measurement of time, with 58 plates. 2 vol. in-4°. Price, 56 fr.
In this work, Mr. Berthoud treats in the greatest detail of all parts of the measurement of time; the construction of watches, of ordinary pendulums; of astronomical clocks, and his first researches on marine clocks; the theory, the construction and the workmanship of these various machines.

3°. History of the measurement of time by Clocks. Paris, 1802; 2 vol. in-4°, with twenty-three engraved plates. Price, 36 fr.
In this work, the Author presents to amateurs of the sciences and arts, under the title of History, the collection of the most important inventions and discoveries that have been made regarding the measurement of time by clocks. The work is divided into twenty-four chapters (these subdivided into several articles).

4°. Treatise on marine Clocks, containing the theory, the construction, the workmanship of these machines, and the manner of testing them, followed by clarifications on the invention, the theory, the construction and the tests of the new machines proposed in France for the determination of longitudes at sea by the measurement of time, with twenty-seven plates. Price, 27 fr.
In his introduction, the Author explains the manner in which marine clocks serve to provide the longitude at sea, and the attempts that have been made until now to achieve this.

5°. Clarifications on the invention, the theory, the construction and the tests of the new machines proposed in France for the determination of longitudes at sea by the measurement of time, serving as a continuation of the Essay on Horology and the Treatise on marine Clocks, etc. vol. in-4°. Price, 6 fr.

6°. Longitudes by the measurement of time, or method for determining longitudes at sea, with the help of marine clocks, followed by the collection of tables necessary for the pilot, to reduce the observations