1826.5 



Geological Society. 387 



ThemBanoHiquityoftheedipti^^^^^^^^ 

 mean obhq. of Jan. 1, lolb, =-.16 _/ 'iJ ,~-i r —'--> ^ » 

 and secular diminution = 43" 3 ^ 



Latitude 33 48 49,29 



If we use Mr. Bessel's obliquity = 23° 07' 45-,66, the lati- 

 tude will be = 33° 48' 47-,89. -Rrinklev's 



The result of all the observations shows that Dr. BrinUey s 

 comtant of refraction (57-,72) is as exact as can be desired 

 vh n the refractions ai computed by the "f -'«^ thermonie.ei 

 also that, when computed by the exterual thermometei, Mr. 

 Bessel's refractions require no correction worth "ot'ce. 



A communication was also read from Colonel Beaufoy in- 

 dosino- a series of observations of Jupiter's satellites, at Bu.hey 

 Heath: near Stanmore, between April, 1816 and December 

 1824 and another series of observations of sdar and lunar 

 eclipses, and occultations of stars by the Moon, occurring m 

 the^same interval of time, from 1816 to 1824 indusiv . Th 

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

 mean time at'Bushey, mean ti-^e at Greenwich an_dthe^^^^^^^^^ 

 ^ame as exhibited in the Nautical Almanac. The disci epances 

 Te'ween th Sts of observation and the Nautical Almanac are 

 fn some cases very considerable. Even with regard to he>r f 

 satellite, the dift4nces sometimes ^-^f^ a minute an^ a half 

 in time • and with regard to the other satellites, the ditterences 

 e"ceed2, 3, 4, andin one case (July 15, 1818), .e.en minutes of 

 "me In this case the discrepance is the same with respect to 

 T^Connaissance des Terns. The others the reporter has not had 



'"Th" reXrof Mr. Atkinson's paper on refraction was also 

 resumed and continued. 



GEOLOGICAL SOCIETY. 



Jan. 21. -A paper was read, entitled, "On the^F'-^^^^^f^^;/ 

 Formations recently discovered in the Environs of ^^^e (Cette) 

 at a short Distance from the Mediterranean and bdow the 

 Levdofthat Sea;" by M. Marcd de Serres, Prot.of Mm. and 

 Ged to the Faculty of Sciences of Montpelher. 



The freshwater formations described in this communicat on 

 have been examined by means of severalwells sunk at about the 

 distance of about three-fourths of a m.e and a n^'^^ « ^ ^ ^alf 

 from the Mediterranean, near Sete in the souU ^f ^r^"^^^ ^ 



A detailed account is given of the several stiata passta 

 throuXtn the three diHerent wells, and of the organic remains 



^^Srr the most Part^arallel and nearly honj^ 

 From the sections it appears, there are two freshwater forma- 



2 c 2 



