1 52 Additional Pariiadars of the Bitl/urg Meteoric Iron. 



M. Poilcelet, captain of engineers, for his vertical water-wheels 

 with curved float-boards, principallj' applicable to slight falls 

 of water. — MM. Ampere and Dulong made a report on a 

 memoir by M. Zamboni, relative to a dry galvanic pile. — 

 M. G. St. Hilaire commenced reading a memoir on the general 

 views respecting monstrosity, with the description of a new 

 kind observed in the human species, named aspalasome. — 

 M. Durville read a note on the observations and collections 

 made during the last voyage round the world. 



jyjjiy 30. — A letter was read from Governor Sir T. Brisbane, 

 communicating a series of astronomical observations made at 

 Paramatta, by MM. Rumker and Dunlop ; and the results of 

 experiments made with the invariable pendulum. — MM. Du- 

 meril and Thenard made reports, in the names of the respec- 

 tive committees of medicine and public health, concerning the 

 rewards adjudged under the will of M. de Montyon. — M. de 

 Humboldt communicated to the Academy some specimens of 

 the seleniurets discovered by M. Finke in the veins of the 

 eastern part of the Hartz, and which M. H. Rose, of Berlin, 

 has lately analysed. These minerals are compounds of se- 

 lenium with lead, cobalt, mercury, and the air. M. Rose 

 has also made some new researches on the combinations of 

 antimony with chlorine and sulphur ; on the analysis of ise- 

 rine, rutile, and the titaniferous iron-ores ; and on the best 

 method of separating titanic acid and oxide of iron. — M. Pouil- 

 let read a memoir on the electricity of the gases, and on the 

 causes of that of the atmosphere. 



XXI. Intelligence and Miscellaneous Articles. 



ADDITIONAL PARTICULARS OF THE BITBURG METEORIC IKON. 



"^^TE extract the following additional particulars of the 

 ' ' Bitburg meteoric iron, described in our number for June, 

 from a letter from Dr. Chladni to Professor Noeggerath, dated 

 Magdeburg, Jan. 9, 1825 ; and given in Schweigger's Journal, 

 Band xiii. p. 116. 



" I thank you heartily for the account of the Bitburg mass 

 of iron so kindly communicated to me, as well as for the piece 

 of that celestial production, reduced by the barbarous smelt- 

 ing process to a common article, no longer fit for any other 

 process. It was a very pleasant new-year's gift. But, although 

 the original properties of this iron have been lost in smelting, 

 if any one well knows the texture of compact meteoric iron, 

 presenting itself in damasked figures as well as in the fracture, 



he 



