306 Royal Academy of Sciences of Paris. 



President. — M. Ampere continued the reading of a Memoir 

 containing some new deductions of the Formula by which he 

 has represented the mutual action of the two elements ot 

 electric currents. — M. Roche read a Memoir on Rotary 

 Motion. 



Jan. 12. — M. de Jussieu, in the name of a Commission, 

 made a favourable Report on M. A. Richard's Memoir on 

 the Family of Elasagneaeoe. — A Memoir of M. Libri, on the 

 Theory of Numbers, was referred to a Commission. — M. Ma- 

 gendie gave a verbal Account of a Memoir by M. Desmoulins 

 on the Composition of the Spinal Marrow. — M. A. St. Hilaire 

 finished the reading of his Memoir on the genera Sauvagesia 

 and Lavradia. — M. Bailli read a Memoir on the use of the 

 Horns of certain Animals, particularly of the Buffalo. — M. 

 Civiale presented a Memoir on a Lithontriptor, or new means 

 of destroying a stone in the bladder without the operation 

 of cutting. 



Jan. 19. — A Memoir was received, On a Gazometer for 

 condensed Gas, by M. Picquet. — Also a Memoir from Las- 

 saigne, On the Possibility of detecting, by chemical Means, the 

 Presence of the Acetate of Morphia in the Viscera of Animals 

 poisoned by it. — M. le Galloias presented a Memoir on animal 

 Heat, written by his father. — A Memoir by M. F. Runge was 

 read, On the Means of discovering the slightest traces of nar- 

 cotic substance in animals poisoned by the Atropa Belladona 

 and Datura. — M. Segalas presented a Kidney converted into 

 a vast membranous sac, by the increase of a great number of 

 calculi. — M. Desmoulins commenced the reading of a Me- 

 moir on the use of the colours of the Choroid Coat in the 

 Eyes of vertebrated Animals. 



Jan. 26. — M. Dublanc jun., apothecary at Paris, stated 

 that he had found the Tincture of Galls to be a very sensible 

 test of the presence of Morphia in liquids, whether alone, or 

 combined with the acetic and sulphuric acids. — M. Navier, 

 Engineer, was elected a member of the Academy. — M. Gi- 

 raud made a favourable Report on the Memoir of MM. Se- 

 guin relative to Suspension Bridges. — M. Babinet read a 

 Note on a new Construction of the Horse-hair Hygrometer. — 

 M. Strauss continued the reading of his Memoir on the Ana- 

 tomy of the Cock-chafer. — M. A. de St. Hilaire read some new 

 observations on the Family of the Rutaceae. 



Feb. 2. —A Memoir was received from M. Remain on Ve- 

 getable Physiology. — Also a Memoir by M. Lame on the Im- 

 possibility of the Equation x 5 +j/ 5 =2 d z s in whole numbers. 

 - — M. Poisson presented his Memoir on the Theory of Mag- 

 netism. — M. Chevallier stated that he had detected ammonia 



