. Proceedings of Scientific Institutions. 79 



Mr Thenard made another report on a memoir of Mr Payen, relative to the 

 fabrication of Plaster. 



Mr Cauchy reported favourably on a memoir of Mr Voisard, relative to ques- 

 tions of Mathematical Analysis. 

 ' Mr Ad. Brongiart read a memoir, entitled observations on the developement of 

 Carbon in the Graminae, and on the modifications which it determines in the parts 

 of the plant which it attacks. 



Jan. 11. Dr Herpen of Metz communicated to the Academy the results of 

 his researches on the employment of Hydrochloric Acid in cleansing ancient 

 buildings. 



Mr Mathieu comnmnicated a letter, addressed from Toulouse to Mr Arago, 

 by Mr D'Aubuisson, containing the indication of the state of the Thermometer 

 in that town during the late great Frost. 



Mr Frederic Cuvier made in his name, and in that of Mr Molard, a favourable 

 report on a procedure employed by Mr Barbier to write and read in obscurity, 

 and adapted to the instruction of the blind. 



Mr Charles Dupin read a memoir, forming part of the continuation of his la- 

 bour on the Revenues of France in the nineteenth century. 



Jan. 18. 1830. Mr Despretz stated several important chemical results to which 

 his labours have led him. 



Mr Mathieu reported favourably on a memoir of Mr Daussy, hydrographer, 

 being the determination of the geographical position of Cairo, Alexandria, and 

 several places in the Mediterranean. 



A memoir of Mr Dutrochet was read, relative to the circular motions observed 

 in waters enclosed in tubes unequally exposed to the action of heat and light. 



Mr Julia de Fontenelle presented a memoir on the conservation of grains, and 

 the fonnation of Silos. 



Mr Dumas addressed a memoir on the formation of pus in the lymphatic ves- 

 sels of the uterus, and in the prelombair ganglions, after three child-births. 



Jan. 25. 1830. Admiral Roussin was elected to the seat, in the section of 

 geography and navigation, vacant by the decease of Mr, de Rossel. 



Mr Dupuytren reported on two works, containing the results of the surgical 

 operations practised by Professor Vincenzio Andreini, in the great hospital of 

 Sainte Marie la Neuve in Flprence, from the year 1824 to 1829. 



Mr Dutrochet wrote to the Academy to communicate some new facts relative 

 to the influence which light exerts on the motion of liquids. 



Mr Bussy requested the Academy to open a sealed packet, deposited with 

 them in August 1828. He announced that it contained chlorure of glucinum, 

 and metallic glucinum, obtained by the decomposition of chlorure. 

 Mr Becquerel read a memoir on some new electro-chemical effects adapted to the 

 production of compounds, and on their application to the crystallization of sul- 

 phur and other substances. 



Mr Cauchy read a memoir on the determination of the primitive roots in the 

 theory of numbers. 



JMr Adrien de Jussieu read a memoir on the group of Meliaceas, in which he 

 doubled the number of species known in tlie present day. 



Acts of the Geographical Society Meeting of the Gth Nov. 1829. Mr Bot- 



tin is requested, by the central commission, to examine and report upon a table 

 of the industry of the Departement du Nord, that Mr Marc Jodat proffered ito 

 the Society. 



Mr Jouannin read a fragment of his journal of an excursion which he made 

 into Bithynia, in the autumn of 1 825. 



Mr de la Pylaie made a communication on the limits between the Agnotes 

 and the Corisossites or Corisopi tenses, that is to say the people of Quimfer. He 

 gave some details on the splendour of the ancient city of Talenta, and the total 

 disappearance of its remains. 



