Royal Academy o/Scie?ices of' Paris. 303 



causes of the yellow fever; M. Arago presented from M. Fiedler, 

 several vitrified tubes produced by lightning; one of them was 

 eighteen feet long. — M. Chevreul requested not to be one of the 

 Commission appointed to examine the memoir of M. Longchamp 

 on nitrification.— M. Latreille, on behalf of a Commission, gave a 

 very favourable account of M. Edwards's memoir On the four un- 

 described species of Crustacea?. — M. Savart, in the name of a Com- 

 mission requested by the Minister of the Interior, announced that 

 there would be no inconvenience in punching M. Paret's weighing 

 machines.— M. Coquebert-Montbret gave a verbal account of se- 

 veral statistical researches by M. Cesar Moreau, vice-consul of 

 France in London, relating to the finances of Great Britain. 



March 10.— M. Vauquelin presented a memoir by M. Farro On 

 the copper extracted from vegetables — M. Raspail presented several 

 plates relating to a memoir which he read in the month of Septem- 

 ber last. — MM. Dumeril and Magendie, named by the Academy, 

 at the request of M. Malbouche, to take cognizance of the pro- 

 cesses received from America, and which, according to M. Mal- 

 bouche, form a certain method of curing stammering, announced 

 that the method succeeds in the greater number of cases. — M. Am- 

 pere gave an unfavourable verbal account of a publication by M. 

 Opoix, respecting the sensations of sound and light. — There were af- 

 terwards read,— a memoir by M. Peclet, On the passage of hot air 

 through pipes; — a memoir by M.Nicollet, On the latitudes of 

 Barcelona and Montjouy, ascertained by M. Mechain ; — a memoir 

 by M. Raspail, On the granules of pollen ; — and a memoir On the 

 mechanism of the voice, by M. Begin. 



March 17. — M. Deleau gave a written account of the progress of 

 four deaf and dumb children, which had been put under his care. — 

 M. Roche presented a memoir relating to the laws according to 

 which the elastic force of vapour increases with the temperature. — 

 M. Gendrin announced that he had obtained very good results in 

 the employment of iodine in the gout. — An anonymous correspon- 

 dent announced that he had discovered an infallible plan for stopping 

 the leakages in the Tunnel under the Thames. — M. Brongniart read 

 a letter from M. Acosta, respecting the earthquake which had de- 

 stroyed a great part of the city of Popayan.— M. Warden communi- 

 cated a note respecting two islands recently discovered in the Pa- 

 cific Ocean, by Captain Joshua Coffin. — M. Arago replied to some 

 doubts which had been expressed respecting M. Fiedler's vitrified 

 tubes; and afterwards gave an analysis of an English memoir, which 

 the President had sent him, respecting two aurorae boreales, observed 

 in America. — M. Dumeril gave a very favourable account of the 

 anatomical researches which MM. Martin and Isidore Saint- Hilaire 

 presented respecting the anatomy of the tortoise and the crocodile. — 

 M. Fourier presented a memoir On the conducting power of bodies. 

 — M. Hericart de Thury read a notice respecting an overflowing 

 spring, lately obtained by boring, in the park belonging to Madame 

 Groslier at Epinay. — M. Dutrochet read additional researches on 

 endosmosis and exosmosis. 



March 



