Astronomy. 



365 



rations were made, and communicated the results to the Astronomical So-' 

 ciety of London, which the committee of the society published in their 

 monthly notices, in the Philosophical Magazine and Annals of Philosophy 

 for September 1827. — In addition to the observations made in this coun- 

 try, I have lately met with some others made in Germany and Italy ; and 

 although most of these have been already calculated by M. Wurm and 

 M. Santini, and inserted in some of the numbers of the Astronomische 

 Nachrichteuy they could not be compared with those I had previously cal- 

 culated, as it appears that M. Santini used Carlini's Tables of the Sun, and 

 Burckhardt's Tables of the Moon ; whereas I used Delambre's Solar, and 

 Damoiseau's Lunar Tables ; and M. Wurm does not state what set of ta- 

 bles he has used. Also, the ellipticity, ^i^, which I have used for re- 

 ducing the latitudes of the places of observation, and also the moon's pa- 

 rallax, differs from that used by M. Santini, which is jj^-. It does not 

 appear what ellipticity M. Wurm has used. Although the figure of the 

 earth has not as yet been satisfactorily ascertained, I do not think it can 

 very much affect the present results, where tlie same ellipticity has been 

 used for each place of observation, whatever may have been the ellipticity 

 used by M. Wurm, his difference of longitude of Bushy Heath and Aber- 

 deen differs only 0"03 from mine, but the difference of our results for 

 Abo is considerable. No correction was applied to the semi-diameter of 

 the sun for irradiation, nor to that of the moon for inflection, as these have 

 not been well ascertained by astronomers. 



Having reason to think the Bushy Heath observations as good as most 

 of the others, as its longitude has been well ascertained, and as both the 

 beginning and end of the eclipse were observed, I have used it as the basis 

 in the reductions. It is in longitude 10' 42", 43, in time west from Paris. 



Correction Longitude 



of Tables from 



in Lat. Bushey Heath. 



Longitude 

 from Paris. 



2,488 



10 42,43 W. 



1 50,44 E. 8 5],99W. 



1 25,57 E. 9 16,86W. 



23 56,24W. 



25 13,41 W. 



6 59,34W. 



90 30,85 E. 



90 26,91 K. 



_ 5,168 90 28,88 E. 



48 47,69 E. 



48 47,05 E. 



— 1,824 48 46,62 E. 



58 17.31 E. 



58 25,88 E. 



-1- 2,345 68 20.08 E. 



38 6,19 E. 



82 28,03 E. 



34 38,67W. 



35 55,84W. 

 17 41,77W. 

 79 48,42 E. 

 79 44,48 E. 

 79 46,45 E. 

 38 5,26 E. 

 38 4,62 E. 

 38 4,19 E. 

 47 34,88 E. 

 47 43,45 E. 

 47 37,65 E. 

 27 23,76 E. 

 71 46,60 E. 



