20 



ASTRONOMICAL OBSERVATIONS 



January 10, 1854. Circle We.st. 



Object. 



y Pegasi 



a Cassiop. R. 



Polaris R. 

 a Bootis s. p. 



T= 10'' 30" 



Mean of wires. 



R. 



gh 27m 07^6 



9 54 04.9 



10 39 39.7 



11 30 03.0 



— 10^3 



— 5.8 

 + 1.5 

 + 9.8 



+ 1».4 

 + 2.4 

 + 54.6 

 — 1.5 



M+R+Cc. 



9" 26'" 58».7 



9 54 01.5 



10 40 35.8 



11 30 11.3 



AR. 



0'' 05"° 42«.0 



32 13.3 



1 05 57 3 



2 08 59.1 



+ H"" 38"" 40^ The normal equations give a = + 10^9 



b= + 20.6 

 , =_ 3.5 



RECAPITULATION OF THE DEDUCED SIDEREAL TIMES OP THE MOON's LIMB. 



1853. Nov. 



18 

 " 21 

 " 23 

 Dee. 8 

 " 9 

 " 12 



<L II. s. 

 <L II. s. 

 <Lll. 

 <L I. 

 € I. 

 C I. 



20 



10 







(1 

 8 



43^2 



00.7 



25.0 



31.5 



53.8)? 



35.6 



1853. 



1854. 



Dec. 13 

 " 14 

 " 14 

 " 15 



Jan. 8 



CI. 



€ I. 

 CII. 

 <t II. 

 <LI. 



4h 19n 



5 10 



5 13 



6 06 

 3 13 



IIM 



53.8 

 06.4 

 38.4 

 14.5 



The longitude is deduced from the above values by a method received from Prof. 

 Peirce in 1851, an account of wliich is given in Coast Survey Report for 1858, 

 Appendix No. 21, p. 186. 



From the Greenwich observations' we have the following corrections to the 

 tabular places of the moon's right ascension, as given in the Greenwich Nautical 

 Almanac: — 



The weights assigned to the moon culminations are approximations; the greater 

 the number and the better tlie agreement of the results from the moon culminatino- 

 stars the greater the weight. The result deduced for December 9 is unreliable, 

 and has been rejected; the result for December 8 is not much better, but has been 

 worked up along with the rest. 



' Astronomical and Magnetic and Meteorological Ob.scrvations at the Royal Observatory, Greenwich. 

 Volumes for 1853 and 1854. London, 1855 and 1856. 



