Astronomical and Nautical Collections. 



99 



The declinations of the principal stars deduced from this volume, 

 employing Bessel's refractions, agree rather better with the 

 Konigsberg catalogue, than with Mr. Pond's own standard cata- 

 logue. 



On the other hand, it is remarkable that the determination of the 

 latitude of Greenwich agrees much better with Mr. Pond's former 

 computation, than with that which Professor Bessel had deduced 

 from Bradley's observation. The former was 51° 28"37"-95, the 

 latter 51° 28' 39"-60 ; the differences being — 0"-393 and + l<'-257. 



In speaking of the longitudes of places from Greenwich, as ex- 

 pressed in time, it was cursorily observed in the last number of 

 these collections, that the time intended is, strictly speaking, side- 

 real. This expression was employed as leading to a result which 

 is unexceptionable, although Mr. J. I. has very properly remarked 

 that it is liable to misconstruction, and that in questions relating 

 to solar time the difference in longitude may, without error, be 

 considered as reckoned in solar time, and not in sidereal. 



iv. Bessel's latest Fundamental Catalogue of Stars, deduced from 

 his Observations in the last five years. Schum. Nachr. No. 78. 



Yearly change 

 R, A. 1825. 1825. 



y Pegasi 4 14-059 3*0790 



« Arietis 1 57 19*619 3*3566 



* Ceti 2 53 8413 31232 



« Tauri 4 25 53-265 3*4298 



a Auriga 5 3 46*523 4*4139 



Ononis 5 6 7*831 2*8785 



Tauri 5 15 14*128 3*7857 



a Ononis 5 45 41*963 3*2453 



a Canis major. . . 6 37 26-048 2-6441 



a Geminor. med. . 7 23 24*848 3*8430 



a Canis minor ... 7 30 8*172 3*1471 



Geminorum ... 7 34 35*645 3*6851 



u Hydrae 9 18 59*154 2-9474 



« Leonis 9 59 2-552 3*2050 



H 2 



Secular 

 alteration. 



+ 0*0097 

 + 0*0201 

 + 0*0097 

 + 0*0109 

 + 0-0184 

 + 0*0043 

 + 0*0089 

 + 0-003 1 

 + 0-0004 



- 0*0125 



- 0*0044 



- 0*0122 



- 0-0015 



- 0*0102 



