The Subject Index was arranged to be published as separate Index-volumes for 

 each of the seventeen Sciences of the Schedules of the International Catalogue, 

 viz. Mathematics, Mechanics, Physics, Chemistry, Astronomy, Meteorology, 

 Mineralogy, Geology, Geography, Palaeontology, Biology, Botany, Zoology, 

 Anatomy, Anthropology, Physiology, and Bacteriology ; but for the present only 

 the volumes relating to the first three of these sciences have been printed. 



The practical advantage which will accrue from thus classifying the literature 

 of each Science seems to be amply sufficient, in spite of unavoidable imperfections, 

 to justify the great expense that has been involved. In the past, a student 

 interested in a single branch of the subject would probably consult special Treatises 

 and Reports from which he could obtain references to the more important memoirs. 

 But it often happens that such references are transferred simply from one treatise to 

 another, and experience shows that important contributions that have once dropped 

 out of sight may for a long time, or indeed ever afterwards, be overlooked. When 

 the whole literature is set out systematically and exhaustively under appropriate 

 headings as in the present volume, such accidents are guarded against so far as 

 seems to be possible. Entries on the same subject are arranged, so far as possible, 

 in order of date, irrespective of the authors' names, with the endeavour to present 

 the subject in the historical form. 



The first volume, dealing with Pure Mathematics, contains 38,748 entries 

 referring to 700 serials. It is believed that these entries cover all the contents of 

 the serials indexed with the exception of about 750 short notes which were not 

 thought of sufficient permanent interest to be entered. 



The second volume, dealing with Mechanics, classifies 21,295 entries referring 

 to the papers contained in 959 serial publications. 



The first part of the volume devoted to Physics has now been published ; it 

 deals with Generalities, Heat, Light, and Sound, and contains 33,344 entries from 

 1,261 serials. The second part of the Physics volume, devoted to Electricity and 

 Magnetism, is now ready; it contains 23,300 entries. 



Each volume contains a list of the serials from which the entries are taken, 

 and indications are given of the principal British libraries in which they may be 

 consulted. 



" When the time for going to press approached, the Committee learned with 

 much satisfaction that the Syndics of the Cambridge University Press were willing 

 to undertake the complete risk of printing and publishing, as regards both the 

 Catalogue of Scientific Papers and the Subject Index. It will be the care of the 

 Committee, and it is hoped of the Scientific world generally, to use their best 

 endeavours that this public-spirited action shall not result in financial loss." 



From the Preface to Volume I 



Vol. I. Pure Mathematics 



Royal 8vo. pp. lviii + 666. Price, Buckram, gilt top, 21s. net; in half Pigskin, gilt top, 27s. net. 



Vol. II. Mechanics 



Royal 8vo. pp. lxxiv+ 356. Price, in Buckram, gilt top, 15s. net ; in half Pigskin, gilt top, 21s. net. 



Vol. III. Physics, Part I. Generalities, Heat, Light, Sound 



Royal8vo. pp. c-t-550 + vn. Price, inBuckram, gilt top, 18s. net; in half Pigskin, gilt top, 24s. net. 



Vol. III. Physics, Part II. Electricity and Magnetism 



Royal 8vo. pp. xvi + 378 + vn. Price, in Buckram, gilt top, 15s. net; in half Pigskin, gilt top, 21s. net. 



This Part, which completes the Subject Index on Physics, deals with Electricity and 

 Magnetism under the Kegistration Numbers 4900 to 6850 ; it contains 23,300 entries, thus making 

 in all 56,644 entries for the subject Physics for the years 1800 to 1900 inclusive. 



Cambridge University Press 



C. F. Clay, Manager 

 London : Fetter Lane, E.C. 

 Edinburgh : 100, Princes Street 



Tp. t. o. 



