Preface 



Mr J. Hardy of the Royal Society of Edinburgh, Mr C. V. Crook of the 

 Geological Museum, Mr Rupert Jones of the Geological Society, Mr J. Knight 

 of the Royal Philosophical Society, Glasgow, Mr F. C. Nicholson of the 

 University, Glasgow, Dr J. H. T. Tudsbery of the Institution of Civil 

 Engineers, Dr B. Daydon Jackson, and Mr A. W. Kappel of the Linnean 

 Society, the Librarian of the London Mathematical Society, Mr J. W. 

 Knapman of the Pharmaceutical Society, Mr E. W. Hulme of the Patent 

 Office Library, Mr W. H. Wesley of the Royal Astronomical Society, 

 Mr F. Allen of the Royal Geographical Society, Mr R. W. Chambers of 

 University College, London, Mr L. W. Fulcher of the Science Library, 

 Science Museum, South Kensington, Dr W. N. Shaw, F.R.S., Director 

 of the Meteorological Office, and Mr V. G. Plarr, Librarian of the Royal 

 College of Surgeons. 



Although much care has been expended in making this list as accurate 

 as possible, it is probable that some errors will still be found, and the Director 

 will be thankful to any one who will send corrections : portions of the list 

 will be required for the subsequent volumes of the Index. 



The following Referees have assisted at various times in the preparation 

 of the Subject Index in Physics: Miss Alice Everett, Miss Burna Pool, 

 Mr R. J. Dallas, Mr W. A. Davis, Mr R. Hargreaves, Dr R. A. Lehfeldt, 

 Mr W. Lowson, Mr H. E. Schmitz, Mr J. H. Shaxby and Dr W. Marshall 

 Watts. The Committee is indebted to them for much valuable help. 



Dr W. Marshall Watts has given special assistance and supervision in 

 the preparation of the Index titles. To him, and to Miss Bremner and the 

 other members of the Catalogue Staff of the Royal Society, thanks are due 

 for careful and conscientious work. 



The Committee is indebted to the authorities of the British Museum, 

 of the Natural History Museum, of the Royal College of Surgeons, of the 

 Patent Office and of the Meteorological Office for facilities given to the type 

 writers and revisers of the Catalogue staff in copying titles of papers from 

 the books in the libraries, and also to the Cambridge University Library, 

 the Chemical Society, the Geological Society, the Linnean Society, the 

 Royal Astronomical Society, the Royal Geographical Society and the Alpine 

 Club for the loan of books for the preparation of the Catalogue. 



Besides these Libraries others have been consulted and the Committee 

 gratefully acknowledges the assistance that has been received. 



