Preface. 



furnishing an easy guide to a book or group of books upon 

 a particular subject. For the preparation of this subject 

 index, the Committee gladly expresses its obligations to 

 Mr. G. S. Sweeting. 



As to what are the best books available is often a 

 matter of individual preference, and the Committee has 

 made no attempt to exercise selective functions in this 

 matter. With the present complete Catalogue, however, 

 to show at a glance the actual works now obtainable, it is 

 much easier to ask an authority upon a specific subject to 

 indicate what he considers the most suitable books for 

 particular needs or purposes whether educational or 

 industrial than it would be in the absence of this list, and 

 the Guild would no doubt furnish such information to any 

 of its members who may desire guidance of this kind. 



The British Science Guild believes that in producing 

 this Catalogue it is promoting the use of knowledge and 

 thereby furthering the development of education, science 

 and industry. The books themselves represent worthy 

 British scientific products and the Catalogue should be a 

 means of extending their use not only at home but also in 

 parts of the Empire overseas and in countries not yet 

 familiar with what we have to offer in scientific and tech- 

 nical literature. If support to this enterprise is sufficiently 

 encouraging, the Guild hopes to issue a revised edition of 

 the Catalogue annually and thus keep up-to-date a 

 publication which should prove of value to workers in 

 many fields. 



R. A. GREGORY. 



