140 Roifal Academy of Sciences of Paris. 



The Academy heard a memoir by M. Gerdry, on the mechanism of 

 the walk of man ; and a work by M. Verniere, containing therapeutic 

 processes applicable to all cases of poisoning. The sections of botany 

 and rural oeconomy, afterwards presented, ex cvquo, MM. Mirbel and 

 Du Petit-Thouars, as candidates for the chair of rural oeconomy, va- 

 cant in the Jardin du Roi, by the death of M, Bosc. 



In this sitting M. Raspail addressed another letter on the subject of 

 what he had written respecting the microscopes of M. Amici. 



August 1 1. — Dr. Lusardi sent a memoir intitled Histoire de V0p4- 

 ration de la Cataracte, et parallele des procides mis en usage jusqu' h 

 nos jours. — M. Huzard, jun. presented a manuscript work Sur les 

 Haras de France. — The Academy elected M. Mirbel in the room of 

 the late M. Bosc. — M. Bertrand-Geslin read a memor intitled. Con- 

 siderations Geognostiques Generates sur le Terrain de Transport en 

 Italie. — M. Flourens vead a memoir of experiments on the semicircu- 

 lar canals of the ears of birds. — M. Cagniard-Latour presented a 

 summary of a memoir on the action of whistling in man. — M. Moreau 

 de Jonnes communicated Recherches de Geographie Botanique sur 

 le Mais. — A notice respecting the variation of the barometer by 

 M. Malbec was read. 



August 18. — An ordonnance of the King was read, approving the 

 nomination of Dr. Serres, as a member of the Academy. — M. Dard 

 sent a letter on the determination of the longitude at sea. — M. Gre- 

 goire presented a memoir on the theory of colours. — M. Griffith sent 

 an account of experiments on the circular motion of certain bodies. — 

 The Academy received two sealed packets : one from M. Cauchy ; 

 the other from MM. Pinot and Fermin. — M. Pouillet read a memoir 

 on the measure of electric currents, and on a method of determining 

 the intensity of terrestrial magnetism. 



August 26. — The following manuscript works were presented : De- 

 scription of an instrument for drawing in perspective, by M. Favret de 

 Saint-Mesmin ; — A letter on the decomposition of water by perchloride 

 of cyanogen, by M. SeruUas; — A letter respecting an instrument for de- 

 termining the size of a stone in the bladder, by M. Guilbert ; — Re- 

 searches on the circulation,respiration, and reproduction of the branchi- 

 ferous annellida, by M. Dugu, of Montpellier. — M. Geoifroy an- 

 nounced that satisfactory news had been received of the expedition 

 commanded by M. Durviile. — M. Dumeril gave a verbal account of 

 a work by M. Piorry, intitled, De la Percussion Mediate, et des Signes 

 ohtenus 5 I'aide de ce nouveau moyen d'exploration dans les maladies 

 des organes thoraciques et ahdominaux. — M. Du Petit-Thouars read a 

 memoir on the origin of bark and of wood. — M. Girou continued the 

 reading of his memoir on the reproduction of domestic animals. — 

 M. Ampere read a memoir on the determination of the curved surface 

 of luminous waves, &c. 



Sept. 1. — The Minister at War thanked the Academy for its report 

 respecting artificial nitre beds. — There were read a memoir on rail- 

 roads by M. Masquelet ;— On cyanic acid by M. S(5rullas j — On the 

 velocity of light, &c. by M. Ampere. — M. Chcvreul, in the name of a 

 commission, gave a favourable account of M. Raymond's memoir on 



the 



