Royal Acadcmi/ of Sciences of Paris. 301 



eclipses, and bccultations of stars by the Moon, occurring in 

 the same interval of time, from 1816 to 1824 inclusive. The 

 eclipses of Jupiter's satellites are so recorded as to show the 

 mean time at Bushey, mean time at Greenwich, and then the 

 same as exhibited in the Nautical Almanac. The discrepances 

 between the I'esults of observation and the Nautical Almanac 

 are in some cases very considerable. Even with regard to 

 the Jirst satellite, the differences sometimes exceed a minute 

 and a half in time ; and with regard to the other satellites, the 

 differences exceed 2, 3, 4, and in one case (July 15, 1818) 

 seven minutes of time. In this case the discrepance is the same 

 with respect to the Connaissance des Terns. — The others the 

 reporter has not had leisure to compare. 



The reading of Mr. Atkinson's paj^er on refraction was also 

 resumed and continued. 



ROYAL ACADEMY OF SCIENCES OF PARIS. 



Jan. 3, 1825. — M. Poisson was elected vice-president for the 

 year ; and M. Chaptal, vice-president for the year preceding, 

 entered upon his office as president for 1825. — M.de Humboldt 

 communicated extracts from various letters he had received from 

 Italy and America. — M. Pelletan, jun. read a note on the gal- 

 vanic phajnomena which he states to accompany acupunctura- 

 tion. — M. Lacroix, in the name of a commission, made a re- 

 })ort on the late M. Peyrard's translation of Ajwlloniiis Per- 

 gccus : the Academy expressed its desire that the printing of 

 this work should be facilitated, as well as of the translation of 

 Euclid. — M. Uupuytren commenced reading a memoir on 

 artificial ani. — Capt. Poncekt's memoir, on vertical undershct 

 wheels with curved float-boards, was submitted to a com- 

 mission. 



Jan. 10. — Professor Delille, of Montpellier, presented a me- 

 moir on the danger of using mushrooms in cookery. — M. Du- 

 meril made a report on a memoir on leeches, by MM. Pel- 

 letier and Ilu/.ard, jun. [see p. 317.]: he also reported on 

 M. de Ferussac's memoir respecting the animal of the genus 

 ArgonauUi. 



Jan. 17. — M. Magendie announced that he had ascertained 

 tlie insensibility of the retina in a female on whom he t)pe- 

 rated for cataract: the contact of an instrument with that or- 

 gan did not produce any appreciable sensation : the patient 

 recovered lier sight inmiediately after the operation. — M. de 

 Basterot read his geological description of the tertiary district 

 of the south-west of Prance, cojnprising some general remarks 

 on lossil Mollusca.—M. Fodera announced that he should 



shortly 



