X 
PRELIMINARY GENERAL CATALOGUE OF STARS FOR 1900 
Extensive extracts from the new general catalogue, in manuscript, of Kustner’s observa¬ 
tions at Bonn, +o° to +54°. The partial catalogues were published in Nos. 4, 5, 
and 6 of Veroffentlichen der Kon. St. zu Bonn. However, when these extracts were 
received the printer’s sheets of this Catalogue were substantially complete as to the 
positions and motions of the stars; but a careful comparison of P.G.C.-Bonn 00 was 
made and the results will be found in the table of systematic corrections, Appendix 
III. 
Catalogue of 1390 stars of which 1150 are south of —36°, in manuscript, from Sir David 
Gill, Astronomer Royal at the Cape. These results, derived from observations 
made at the author’s request, were completed within one year from beginning of the 
observations and communicated to the Dudley Observatory within a few weeks after 
the termination of the observations. There were in general three observations of 
each star, occasionally more. With Cape 00 they constitute a complete reobservation 
of the stars in this Preliminary General Catalogue south of —36°. 
Other manuscript contributions and advance printers’ sheets were sent to the 
Dudley Observatory in aid of these computations by the directors of the Paris, 
Cape, Edinburgh, and Greenwich observatories, and by Professor Porter of the 
Cincinnati observatory, which subsequently were superseded by the published 
catalogues. 
The later epochs of this Catalogue have been also strengthened by observations 
made at the Dudley Observatory that are not yet published. Every star of the 
Catalogue between — 21 0 and — 37 0 (as well as some others) has received at least 
two observations by the author with the meridian-circle of the Dudley Observatory 
at a mean date of about 1898. Nearly all stars of this Catalogue between +i° 
and —2 0 were observed twice near the epoch, 1900, by Mr. Arthur J. Roy, first 
assistant of the Dudley Observatory. Between 700 and 800 of the stars north of 
— 20° that were most in need of special observation were observed here four times, 
or more, in the years 1905-1906. These stars may often be recognized by the large 
p. e. of 100 /x, and the comparative lateness of the epoch. They are mostly between 
the fifth and sixth magnitudes. 
In a very few instances of stars between the fifth and sixth magnitudes that are 
extremely deficient in earlier observations, the Histoire Celeste of Lalande, Rumker’s 
catalogues for 1836 and 1850, Argelander’s observations published in Vol. VI of 
Bonn Observations , and some other authorities of comparatively feeble weight, were 
included in the computations, with rough estimates of the systematic corrections 
and weights. 
Bonn 00. 
Cape 06. 
