296 Royal Academy of Sciences of Paris. 



Academy received Professor Simonof's memoir on the cause 

 of the difference of temperature between the two hemispheres 

 of the terrestrial globe, founded on some thermometrical 

 observations made by the author during his voyage round 

 the world. (Casan, 1825.) — M. Arago announced several re- 

 sults of his new researches on the influence of the most dif- 

 ferent substances on the motions of the magnetic needle. — 

 M. Poisson announced that he had arranged a memoir on the 

 theory of questions of this kind, which he would submit at the 

 next sitting. — M. Berard, in the name of M. Ballart, of Mont- 

 pellier, read a memoir on a particular substance contained in 

 sea-water, which he calls muride. — M. Raspail read a memoir 

 on hordei'ne and gluten, and on the difficulty of isolating the 

 various principles of which any farina consists ; with notes on 

 stearine, sago, and adorganthine. — M. Magendie presented a 

 memoir by M. Housset, of Bordeaux, entitled Observations 

 on common honey. 



July 10. — M. Poisson read his memoir on the theory of 

 magnetic motions. 



July 1 7. — The minister of the interior transmitted a frag- 

 ment of an aerolite which fell lately in the environs of Castres 

 (Tarn). It was referred for examination to MM. Vauquelin 

 and Thenard, and the minister was solicited to obtain all the 

 particulars regarding it that could be collected. — M. de Hum- 

 boldt announced the discovery, by M. Boussingault, of the 

 true geological position of platina. Hitherto this metal had 

 been found only in the alluvial districts of Choco, of Brasil, 

 and of the Urals ; but M. Boussingault has discovered rounded 

 grains of platina mingled with those of native gold, in the 

 gangue of veins in the province of Antioquia. These veins 

 traverse a formation of greenstone, diorite, and syenite. — M. 

 Dupetit-Thouars read the first part of his researches on the 

 parts of vegetables which should be denominated organs. — 

 M. Paravey read a memoir on the common origin of the cy- 

 phers and letters made use of by different nations. 



July 24. — M. Raymond, clock-maker, read a memoir on a 

 new system of balancing without compensation, applicable to 

 clocks, and particularly to the uniform measure of time. — 

 M. Moreau de Jonnes read two notes ; 1 . Statistic sketches of 

 the extent and value of the cotton trade, and of the fabrication 

 of tissues of that material, and the consumption of them in the 

 principal countries of Europe; 2. On an earthquake at Mar- 

 tinique, in the night of the 1st and 2d of last May. 



July 31. — M. Saint- Andre, professor of therapeutics and 

 materia medica at Toulouse, communicated a memoir on 

 some new products of the analysis of various quinquinas, se- 

 lected 



