278 RECORD OF THE ROYAL SOCIETY 



The material for the entries in the main Catalogue according to Authors 

 has now been almost completely collected. This has involved the indexing of 

 over 1,500 Journals and Transactions ; and the accumulation of about 800,000 

 titles for the Indexes for the century, and about 413,000 titles for the 

 remaining portion for the years 1883-1900 of the Catalogue of Authors. 

 The titles in the Catalogue so far as already published number about 390,000. 

 While the collection of this material was going on, the Index volumes for Pure 

 Mathematics and Mechanics were prepared and have been published, while 

 the Index for Physics, which will appear in two volumes, is now going 

 through the press. It is intended to go to press with the completion of the 

 main Catalogue according to Authors in the autumn of 1912. In the matter 

 of the printing and publication of the Catalogue, the Royal Society has 

 secured the very efficient collaboration of the Cambridge University Press, 

 who have undertaken to bear the responsibility for the expenses incurred. 



THE YEAR-BOOK. 



This volume is published annually as early in the year as may be practic- 

 able. It is intended to provide the Fellows with a convenient compendium 

 of information regarding the membership and various activities of the Society. 

 It contains a brief Calendar of the chief fixed dates of the Society's meetings, 

 lists of the Fellows and Foreign Members with their addresses, of the 

 Committees and Boards, of the Statutes and Standing Orders, regulations 

 regarding Medals, Funds, and other matters, the Report of the Council for the 

 preceding year, with a full statement of the income and expenditure and the 

 condition of the Society's finances, the progress and state of the Society at the 

 time, a list of the grants made from the Donation Fund, the accounts of the 

 International Catalogue and of the National Physical Laboratory, the minutes 

 of the ordinary meetings of the Society for the foregoing year, and other details. 



OCCASIONAL PUBLICATIONS. 



From time to time the Royal Society has undertaken the publication, in 

 separate form, of scientific memoirs which were regarded as important but 

 which were not suited for the pages of the ' Philosophical Transactions '. A list 

 of some of those issued in the early years of the Society's history has been 

 given in Chapter I of this volume (p. 40). A corresponding list of some of 

 the more important publications of this kind since the middle of the last 

 century is here presented. 



* The First Principles of Observational Seismology, being an account and 

 discussion of the Great Neapolitan Earthquake of 1857.' By Robert 

 Mallet, C.E., F.R.S. 2 vols. 8vo. London 1862. 

 ' Observations of the International Polar Expeditions 1882-3. Fort Rae.' 



4to. 1886. 

 ' The Eruption of Krakatoa and subsequent Phenomena.' 4to. 1888. 



