BIBLIOGRAPHY 



EXPLANATORY NOTE 



THE bibliography is arranged under Chapter headings II to 

 XVIII, except that references in Chapters XI to XIV (Agri- 

 culture) and XV to XVII (Health and Medicine) are grouped 

 together. Details of the reference system are in accordance with 

 the suggestions made by a Committee of the Royal Society in 1936, 

 but with certain modifications. Under each heading the names of 

 authors or territories are arranged alphabetically and followed by 

 the year of publication, except in the case of annual reports, either 

 general or departmental, which are referred to by the year to which 

 the report has application, and distinguished by the letters A.R. 

 (general annual report) or D.R. (annual departmental report) 

 placed after them. In cases where several papers published by one 

 author in the same year are cited, small letters, a, b, c, d, etc., are 

 placed after the date to indicate which paper is being referred to. 

 Titles of papers and of books are in romantype. As far as possible 

 the short titles of periodicals, printed in italics, are those given in 

 the World List of Scientific Periodicals ( 1 934) : volume numbers are 

 printed in bold-faced type, and the beginning and end pages of 

 papers are given in most cases. 



