304 Royal Academy of Sciences of Paris. 



March 24. — M. Poinsot presented a note on the formulae, by the 

 aid of which the invariable plan of our system is determined, regard 

 being had to the rotary motion of the sun. — M. Cuvier exhibited a 

 portion of a fossil jaw recently discovered in the gypsum of Mont- 

 martre, analogous only to that of an animal of Van pieman's Land^ 

 — Dr. Foville presented his researches On the anatomy of the brain. 

 — The Academy afterwards heard a verbal report by M. Damoiseau 

 On the chronological researches of M. Eustache Oliveri ;■— a memoir 

 On vision, by M.Vallee ; — a memoir by M. Becquerel, On the effects 

 of heat upon the tourmaline and bad conductors of electricity. 



March 31. — The Academy received a sealed packet from M. Ca- 

 ventou, containing the results of some experiments on vegetable 

 chemistry ; — a letter from M. Coulier, On the means of preventing 

 the falsification of writings; — a note by M. Serullas, On the sweet 

 oil of wine, oxalic aether, and bicarburetted hydrogen ; — an extract 

 of a memoir by M. Gaudin On colours ; — an analysis of M. de Fer- 

 raont's work On the circulation and on respiration ; — a memoir by 

 M. Vallot, On some ancient descriptions and drawings of the giraffe ; 

 —a notice by M. Thirria, On the grottos of Echenoz and Fouvent 

 (Haute-Saone), and the fossil bones which they contain. — M. Ma- 

 thieu, in the name of a Commission, reported on the memoir of M. 

 Alexandre Roger, concerning the height of Mont-Blanc. — M. Beu- 

 dant began the reading of a memoir On the chemical composition 

 of mineral substances. 



April 7. — The Academy received a memoir On the equilibrium 

 of solid bodies, by MM. Lame and Clapeyron ;— a memoir by M. 

 Duhamel, On the mathematical theory of heat; — a note by M.Braun, 

 On the possibility of directing air-balloons; — a letter from M. Co- 

 rencez, who offered himself as a candidate for the vacant place of 

 member in the section of geometry ; — a memoir by M. Farreau, On 

 the presence of copper in vegetables, and the blood. — M. Geoffroy 

 Saint-Hilaire stated that the anatomical facts discovered by his son 

 and M. Martin, had been completely illustrated by examining yes- 

 terday a dead tortoise at the Menagerie. — M. Chevreul read a me- 

 moir On the influence which two colours may exert upon each 

 other when seen together. 



April 14. — The Academy received a sealed packet from MM. 

 Chevalier and Langlume, containing an account of some improve- 

 ments in lithographic processes ; — the results of meteorological ob- 

 servations made at Alais, in 1827, by M. d'Hombres-Firmas ; — an- 

 other letter from M. de Coulier, On the means of preventing the 

 falsification of writings; — a memoir on the Euripode by M.Guerin ; — 

 a memoir by M. Corancez, On the integration of equations, &c. ; — a 

 note from M.Tournal, On the sulphur which had been found in the 

 gypseous fresh-water formation at Narbonne. — M. Beudant read a 

 notice on vitrified tubes. — M. Coquebert announced that, according 

 to M. Pentiand, there are in America several higher mountains than 

 Chimborazo. — M. Geoffroy Saint-Hilaire gave an unfavourable 

 account of M. Vallot's memoir On the giraffe. — M. Maisonabe ex- 

 hibited a boy of twelve years old, who had club feet ; one of them 



had 



