66 Royal Academy of Sciences of Paris. 



enabled him to liquefy chlorine, cyanogene, and ammonia. — 

 M. Moreau de Jonnes exhibited the young in the state imme- 

 diately prior to birth of the Trigonocephaly fa- de lance. — 

 M. Fresnel, in the name of a Commission, made a Report 

 upon an instrument which M. Thilonier had originally de- 

 signed for the fabrication of mirrors for telescopes, but which 

 he had also applied to the formation of the parabolic and el- 

 liptic mirrors of copper employed in experimental philosophy: 

 in this respect the Memoir appeared worthy the approbation 

 of the Academy-— M. Geoffroy Saint-Hilaire read a Memoir 

 on the Osseous System, as affording the most certain indica- 

 tions of zoological affinities, and on the presumed causes of 

 its superiority in that respect. — M. Latreille read an extract 

 from his Memoir on the Geography of central Africa. — 

 M. Mongez commenced reading a Memoir on the Trees called 

 by the Romans Citrus and Citrum. — M. le Baron Blias read 

 his Researches on the Theory of Sound and of Vibrations. 



March 22. — The Minister of the Interior communicated to 

 the Academy a Report by the Sub-Prefect of Embrun, contain- 

 ing Observations made during a journey to Chamouni. — M. 

 Magendie communicated the results of his experiments on the 

 sense of smell. He announced that this sense is not entirely 

 destroyed by the division of the olfactory nerve: he described 

 also the various effects which result from the division of the 

 fifth pair of nerves. — M. Freycinet read a letter from M. Du- 

 perry, dated Otaheite, in which that officer announced the dis- 

 covery of four new islands near the Perilous Archipelago. — 

 M. Percy made a Report on a new Method of destroying the 

 Stone in the Bladder, proposed by Dr. Civiale. — M. Gay- 

 Lussac read for himself and Dr. Liebig a Memoir on the 

 Fulminate of Silver. — M. Serulas, pharmaceutic chemist, read 

 a Memoir on a new Compound of Iodine, Azote, and Carbon. 



March 29. — A Note by M. Becquerel was read, in which 

 he explained in what manner, by means of an extremely sen- 

 sible apparatus, he had succeeded in determining the electro- 

 motive actions which take place at the moment when acid 

 and alkaline solutions come into contact with any metal; 

 and likewise those which take place when a liquid is inter- 

 posed between two metals. — M. Mongez concluded the read- 

 ing of his Memoir on the Citrus of the Romans. — M. Fouil- 

 houx read a Memoir entitled " Anatomical and Physiological 

 Remarks on the Ganglionic System." — An abridged Analysis 

 of a Memoir by M. Roche, on the Rotatory Motion of Solid 

 Bodies, was presented to the Academy. — M. Poinsot men- 

 tioned that he had completed a work which contained several 

 theorems recently announced by him. 



The 



