214 



CARNEGIE INSTITUTION OF WASHINGTON. 



From the preliminary clock corrections already obtained, it would 

 appear that the Riefler clocks have been less subject to a diurnal term 

 at Albany than at San Luis. 



PREPARATIONS FOR THE GENERAL CATALOGUE. 



Further progress has been made on the general catalogue. The 

 observations taken from catalogues received within recent years are 

 being entered upon the card catalogue. The systematic relations of 

 the following catalogues to the standard system have been wholly or 

 in part determined: 



1. Moscow 1860 0° to +4°. 



2. Berlin 1865 Largely zodiacal. 



3. Warsaw 1880 -2° to -7°. 



4. Pulkova 1885 Observations of Romberg. 



5. Cincinnati 1895 Largely proper-motion stars. 



6. Abbadia 1900 +5° to —3°. Astrographic Standards. 



7. Abbadia 1900 +16° to +24°. Astrographic. 



8. Abbadia 1900 -3° to -9°. Astrographic. 



9. Abbadia 1900 Fundamental for three preceding. 



10. Brussels 1900 +21° and 22°. 



11. Cape 1900 N of -34°. Largely zodiacal. 



12. Cordoba Gen. Cat... 1900 With miscellaneous stars, largely —15° to —35°. 



13. Cordoba Zone 1900 -22° to -27°. 



14. Christiania 1900 +65° to +70°. 



15. Dublin 1900 Various. 



16. Edinburg 1900 Zodiacal. 



17. Greenwich 1900 General, zodiacal, and astrographic standards. 



18. Hamburg 1900 +80° to 81°. 



19. Harvard Zone 1900 -10° to -14°. 



20. Lick, Vol. X 1900 Zodiacal. 



21. Munich 1900 Largely +45° to +60°. 



22. Nice 1900 Struve and other stars. 



23. Odessa 1900 Fundamental. 



24. Perth 1900 -31° to -42°. 



25. Pulkova 1900 Fundamental. 



26. Radcliffe 1900 to +5°. Zodiacal and various. 



27. Washington Zone. .. . 1900 -14° to -18°. 



28. BerHn 1905 Various. 



29. Berlin C 1905 +70° to +75°. 



30. Perth 1905 Fundamental for Perth 1900. 



31. La Plata 1925 -52° to -57°. 



Several other catalogues may be useful at a later stage, but have 

 been laid aside for the present because of lack of stars in common with 

 the general catalogue, or because they contain few or no fundamental 

 stars from which systematic corrections can be derived. 



It is now possible to compute refined positions and proper-motions 

 where they are immediately needed. Such positions and proper- 

 motions have been furnished to Dr. Heber D. Curtis in connection 

 with his studies on the Einstein effects. 



PREPARATIONS FOR FUTURE WORK. 



Plans for the future operations of the Department are gradually 

 progressing. As a first step a survey is being taken of the stars mainly 

 between 8.0 and 9.0 magnitudes to determine the selection of an 



