Catalogue of xodiacal Stars. 15 
~~ 
which will be made in the publication, renders it desirable to com- 
mence with the more important zodiacal region. 
An account of the several existing catalogues having been 
drawn up by the present writer, and inserted in the last volume 
of the Phil. Mag., renders it unnecessary to repeat in this place 
those details, which would otherwise have formed part of the 
present introduction. 
The catalogue consists of twelve columns, the contents of which 
shall be explained seriatim. 
1—3. Under the head “ Synonyms,” are in the first place 
comprised three columns, ‘The first contains the number by 
which each star is distinguished in Piazzi’s last catalogue. It is 
essential to notice, that every hour of Right Ascension commences 
a fresh numerical series ; consequently, in quoting from Piazz1, 
it is necessary to prefix to the number of the star, the hour of 
Right Ascension as marked in Roman numerals at the top of the 
seventh column. ‘The second column exhibits in like manner 
the number by which the star is distinguished in Bode’s folio 
catalogue ; with this difference, that here the numbers recom- 
mence with each constellation, which makes it necessary to men- 
tion the latter, when quoting from Bode. The third column in- 
eludes the number by which the star is known in the general 
catalogue of Flamsteed (frequently termed the Britannic) or the 
zodiacal ones of Mayer, or La Caille. Although the same star 
should be found in more than one of the three last mentioned 
catalogues, yet it is considered sufficient to give the reference to 
one only: and the reader should bear in mind, that it is by the 
denomination given in this third column, that the star is most 
commonly known among astronomers. The numbers from Mayer 
or La Caille have the letters m and c prefixed to them respec- 
tively; those from Flamsteed are without any letter. It is al- 
most superfluous to observe, that where the third column is blank, 
the star is not found in either of the three catalogues to which 
that column is appropriated. 
4. contains the Greek or Roman character ; and includes not 
only those adopted by Flamsteed (which vary a little from the 
original ones of Bayer), but also the additional ones first intro- 
duced by Bode in his Uranographia, which have not before been 
noticed in any English work. ‘These additional characters are 
included between parentheses. 
5. The name of the constellation is inserted in the fifth-column, 
but is abbreviated 40 save room. A dash signifies the same as 
the preceding line. The boundaries of constellations being al- 
together arbitrary, it maybe readily supposed, that the catalogues 
frequently disagree in this particular, The Brit. Cat. is well 
P2 known 
