All papers relating- to a particular Comet should be found in the 

 Comet Section 6600, under tlie designation of the Comet, such being- 

 in order of date and number, All papers of the same character relating 

 to a particular minor planet should similarly be found in the corres- 

 ponding- section {e.g., 5960 for brightness) under the permanent 

 number (or provisional letter where no number is yet assigned) ; each 

 section being arranged in numerical order. It has not been considered 

 advisable to attempt this analysis of papers in the case of stars 

 (variable or double). 



If the reader remember the name of the Author of a paper on a 

 given subject, he will probably fiud it convenieut to refer to the 

 Authors' Catalogue rather than to the Subject Catalogue. 



In the Authors' Catalogue the four-figure numbers placed within 

 square brackets at the end of each entry are Registration numbers, 

 and serve to indicate the scope of each paper indexed. The meaning 

 of these numbers will at once be found by reference to the Schedule. 



In case the abbreviated titles of Journals are not understood, a key 

 to these is provided at the end of the volume. 



