Verzeichniss der von Bradley, Piazzi, Lalande und Bessel beobach- 

 teten Sterne, in dem Theile des Himmels zwischen 14 h 56' bis 

 16 h 4' gerader Aufsteigung, und 15° siidlicher bis 15° nordlicher 

 Abweichung, berechnet und auf 1800 reducirt von Herrn Pro- 

 fessor Harding in Gottingen. — Auf Veranlassung der Konigl. Aka- 

 demie der Wissenschaften in Berlin. — Akademische Sternkarten : 

 Zone xv uhr, Blatt 16. folio. — Professor Harding, For. Mem. R.S. 



Chart illustrative of the preceding Work. — The Same. 



Traite Elementaire de Matiere Medicale. Troisieme Edition, revue, 

 corrigee, et augmente'e. Par J. B. G. Barbier, D.M. 8vo. — The 

 Author. 



Apercu du Commerce Fran$ais avec tous les Pays du Monde. Par 

 Cesar Moreau, F.R.S.— The Author. 



Eloge Historique de M. le Marquis De la Place, prononce dans la 

 Stance publique de l'Academie Royale des Sciences, le 15 Juin 

 1829 ; par M. le Baron Fourier. 4to — The Academy. 



A Paper was read, entitled, xt Researches in Physical Astrono- 

 my j" by John William Lubbock, Esq. V.P. and Treasurer of the 

 Royal Society. 



The author has shown in a former paper, published in the last 

 part of the Philosophical Transactions for 1830, that the stability 

 of a system of bodies subject to the law of gravitation, is always 

 preserved, provided they move in a space absolutely devoid of re- 

 sistance. This conclusion results from the analytical expressions 

 for the variations of the elliptic constants in the theory of the 

 Planetary Motions. 



In the present paper he extends his researches to the problem of 

 the precession of the Equinoxes, which admits of a similar solution 

 to the former. Of the six constants which determine the position 

 of the revolving body, and the axis of instantaneous rotation, at any 

 instant, three have only periodic inequalities ; while the other three 

 have each a term which varies as the time ; but from the manner in 

 which these constants enter into the resulting expressions, the equi- 

 librium of the system may be inferred to be stable, as in the former 

 case. By the stability of the system, the author wishes to be un- 

 derstood to mean that the pole of the axis of rotation has always 

 nearly the same geographical latitude, and that the angular velocity 

 of rotation, and the obliquity of the ecliptic vary within small limits ; 

 and that its variation is periodical. 



The author also gives new methods of obtaining the inequalities 

 of longitude, and the radius vector, in the planetary theory, retain- 

 ing the square of the eccentricities. When only the first powers 

 of the eccentricities are retained, these expressions admit of sim- 

 plification. He subjoins as a numerical example, the calculation of 

 the coefficients of two of the inequalities of longitude in the theory 

 of Jupiter disturbed by Saturn ; and points out the requisite substitu- 

 tions for rendering the formulae applicable to the case of a superior 

 planet disturbed by an inferior planet. 



